test 1
(1) kern='a' ksize=1 user='a' usize=1 copied=1
(1) kern='a' ksize=5 user='a' usize=1 copied=1
(1) kern='a' ksize=9 user='a' usize=1 copied=1
(1) kern='a' ksize=10 user='a' usize=1 copied=1
(1) kern='a' ksize=11 user='a' usize=1 copied=1
(1) kern='a' ksize=20 user='a' usize=1 copied=1
(1) kern='b' ksize=1 user='bbbbbbbbb' usize=9 copied=1
(1) kern='b' ksize=1 user='bbbbbbbb' usize=8 copied=1
(1) kern='b' ksize=1 user='bbbbbbb' usize=7 copied=1
(1) kern='b' ksize=1 user='bbbbbb' usize=6 copied=1
(1) kern='b' ksize=1 user='bbbbb' usize=5 copied=1
(1) kern='b' ksize=1 user='bbbb' usize=4 copied=1
(1) kern='b' ksize=1 user='bbb' usize=3 copied=1
(1) kern='b' ksize=1 user='bb' usize=2 copied=1
(1) kern='b' ksize=1 user='b' usize=1 copied=1
(5) kern='bbbbb' ksize=5 user='bbbbbbbbb' usize=9 copied=5
(4) kern='bbbb' ksize=5 user='bbbb' usize=4 copied=4
(9) kern='bbbbbbbbb' ksize=9 user='bbbbbbbbb' usize=9 copied=9
(9) kern='bbbbbbbbb' ksize=10 user='bbbbbbbbb' usize=9 copied=9
(9) kern='bbbbbbbbb' ksize=11 user='bbbbbbbbb' usize=9 copied=9
(9) kern='bbbbbbbbb' ksize=20 user='bbbbbbbbb' usize=9 copied=9
(1) kern='cbbbbbbbb' ksize=1 user='cccccccccc' usize=10 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccccc' usize=9 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccccc' usize=8 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccc' usize=7 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccc' usize=6 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccc' usize=5 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccc' usize=4 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccc' usize=3 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cc' usize=2 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='c' usize=1 copied=1
(5) kern='cccccbbbb' ksize=5 user='cccccccccc' usize=10 copied=5
(5) kern='cccccbbbb' ksize=5 user='ccccc' usize=5 copied=5
(9) kern='ccccccccc' ksize=9 user='cccccccccc' usize=10 copied=9
(1) kern='c' ksize=9 user='c' usize=1 copied=1
(10) kern='cccccccccc' ksize=10 user='cccccccccc' usize=10 copied=10
(10) kern='cccccccccc' ksize=11 user='cccccccccc' usize=10 copied=10
(10) kern='cccccccccc' ksize=20 user='cccccccccc' usize=10 copied=10
(1) kern='dccccccccc' ksize=1 user='ddddddddddd' usize=11 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddddd' usize=10 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddddd' usize=9 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddd' usize=8 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddd' usize=7 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddd' usize=6 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddd' usize=5 copied=1
(1) kern='dccccccccc' ksize=1 user='dddd' usize=4 copied=1
(1) kern='dccccccccc' ksize=1 user='ddd' usize=3 copied=1
(1) kern='dccccccccc' ksize=1 user='dd' usize=2 copied=1
(1) kern='dccccccccc' ksize=1 user='d' usize=1 copied=1
(5) kern='dddddccccc' ksize=5 user='ddddddddddd' usize=11 copied=5
(5) kern='dddddccccc' ksize=5 user='dddddd' usize=6 copied=5
(1) kern='d' ksize=5 user='d' usize=1 copied=1
(9) kern='dddddddddc' ksize=9 user='ddddddddddd' usize=11 copied=9
(2) kern='dd' ksize=9 user='dd' usize=2 copied=2
(10) kern='dddddddddd' ksize=10 user='ddddddddddd' usize=11 copied=10
(1) kern='d' ksize=10 user='d' usize=1 copied=1
(11) kern='ddddddddddd' ksize=11 user='ddddddddddd' usize=11 copied=11
(11) kern='ddddddddddd' ksize=20 user='ddddddddddd' usize=11 copied=11

test 2
(2) kern='a' ksize=1 user=' a' usize=2 copied=1
(2) kern='a' ksize=5 user=' a' usize=2 copied=1
(2) kern='a' ksize=9 user=' a' usize=2 copied=1
(2) kern='a' ksize=10 user=' a' usize=2 copied=1
(2) kern='a' ksize=11 user=' a' usize=2 copied=1
(2) kern='a' ksize=20 user=' a' usize=2 copied=1
(2) kern='b' ksize=1 user=' bbbbbbbbb' usize=10 copied=1
(1) kern='b' ksize=1 user='bbbbbbbb' usize=8 copied=1
(1) kern='b' ksize=1 user='bbbbbbb' usize=7 copied=1
(1) kern='b' ksize=1 user='bbbbbb' usize=6 copied=1
(1) kern='b' ksize=1 user='bbbbb' usize=5 copied=1
(1) kern='b' ksize=1 user='bbbb' usize=4 copied=1
(1) kern='b' ksize=1 user='bbb' usize=3 copied=1
(1) kern='b' ksize=1 user='bb' usize=2 copied=1
(1) kern='b' ksize=1 user='b' usize=1 copied=1
(6) kern='bbbbb' ksize=5 user=' bbbbbbbbb' usize=10 copied=5
(4) kern='bbbb' ksize=5 user='bbbb' usize=4 copied=4
(10) kern='bbbbbbbbb' ksize=9 user=' bbbbbbbbb' usize=10 copied=9
(10) kern='bbbbbbbbb' ksize=10 user=' bbbbbbbbb' usize=10 copied=9
(10) kern='bbbbbbbbb' ksize=11 user=' bbbbbbbbb' usize=10 copied=9
(10) kern='bbbbbbbbb' ksize=20 user=' bbbbbbbbb' usize=10 copied=9
(2) kern='cbbbbbbbb' ksize=1 user=' cccccccccc' usize=11 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccccc' usize=9 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccccc' usize=8 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccc' usize=7 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccc' usize=6 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccc' usize=5 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccc' usize=4 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccc' usize=3 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cc' usize=2 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='c' usize=1 copied=1
(6) kern='cccccbbbb' ksize=5 user=' cccccccccc' usize=11 copied=5
(5) kern='cccccbbbb' ksize=5 user='ccccc' usize=5 copied=5
(10) kern='ccccccccc' ksize=9 user=' cccccccccc' usize=11 copied=9
(1) kern='c' ksize=9 user='c' usize=1 copied=1
(11) kern='cccccccccc' ksize=10 user=' cccccccccc' usize=11 copied=10
(11) kern='cccccccccc' ksize=11 user=' cccccccccc' usize=11 copied=10
(11) kern='cccccccccc' ksize=20 user=' cccccccccc' usize=11 copied=10
(2) kern='dccccccccc' ksize=1 user=' ddddddddddd' usize=12 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddddd' usize=10 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddddd' usize=9 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddd' usize=8 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddd' usize=7 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddd' usize=6 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddd' usize=5 copied=1
(1) kern='dccccccccc' ksize=1 user='dddd' usize=4 copied=1
(1) kern='dccccccccc' ksize=1 user='ddd' usize=3 copied=1
(1) kern='dccccccccc' ksize=1 user='dd' usize=2 copied=1
(1) kern='dccccccccc' ksize=1 user='d' usize=1 copied=1
(6) kern='dddddccccc' ksize=5 user=' ddddddddddd' usize=12 copied=5
(5) kern='dddddccccc' ksize=5 user='dddddd' usize=6 copied=5
(1) kern='d' ksize=5 user='d' usize=1 copied=1
(10) kern='dddddddddc' ksize=9 user=' ddddddddddd' usize=12 copied=9
(2) kern='dd' ksize=9 user='dd' usize=2 copied=2
(11) kern='dddddddddd' ksize=10 user=' ddddddddddd' usize=12 copied=10
(1) kern='d' ksize=10 user='d' usize=1 copied=1
(12) kern='ddddddddddd' ksize=11 user=' ddddddddddd' usize=12 copied=11
(12) kern='ddddddddddd' ksize=20 user=' ddddddddddd' usize=12 copied=11

test 3
(1) kern='a' ksize=1 user='a ' usize=2 copied=1
(1) kern='a' ksize=1 user=' ' usize=1 copied=0
(2) kern='a' ksize=5 user='a ' usize=2 copied=2
(2) kern='a' ksize=9 user='a ' usize=2 copied=2
(2) kern='a' ksize=10 user='a ' usize=2 copied=2
(2) kern='a' ksize=11 user='a ' usize=2 copied=2
(2) kern='a' ksize=20 user='a ' usize=2 copied=2
(1) kern='b' ksize=1 user='bbbbbbbbb ' usize=10 copied=1
(1) kern='b' ksize=1 user='bbbbbbbb ' usize=9 copied=1
(1) kern='b' ksize=1 user='bbbbbbb ' usize=8 copied=1
(1) kern='b' ksize=1 user='bbbbbb ' usize=7 copied=1
(1) kern='b' ksize=1 user='bbbbb ' usize=6 copied=1
(1) kern='b' ksize=1 user='bbbb ' usize=5 copied=1
(1) kern='b' ksize=1 user='bbb ' usize=4 copied=1
(1) kern='b' ksize=1 user='bb ' usize=3 copied=1
(1) kern='b' ksize=1 user='b ' usize=2 copied=1
(1) kern='b' ksize=1 user=' ' usize=1 copied=0
(5) kern='bbbbb' ksize=5 user='bbbbbbbbb ' usize=10 copied=5
(5) kern='bbbb' ksize=5 user='bbbb ' usize=5 copied=5
(9) kern='bbbbbbbbb' ksize=9 user='bbbbbbbbb ' usize=10 copied=9
(1) kern='bbbbbbbbb' ksize=9 user=' ' usize=1 copied=0
(10) kern='bbbbbbbbb' ksize=10 user='bbbbbbbbb ' usize=10 copied=10
(10) kern='bbbbbbbbb' ksize=11 user='bbbbbbbbb ' usize=10 copied=10
(10) kern='bbbbbbbbb' ksize=20 user='bbbbbbbbb ' usize=10 copied=10
(1) kern='cbbbbbbbb' ksize=1 user='cccccccccc ' usize=11 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccccc ' usize=10 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccccc ' usize=9 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccc ' usize=8 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccc ' usize=7 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccc ' usize=6 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccc ' usize=5 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccc ' usize=4 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cc ' usize=3 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='c ' usize=2 copied=1
(1) kern='cbbbbbbbb' ksize=1 user=' ' usize=1 copied=0
(5) kern='cccccbbbb' ksize=5 user='cccccccccc ' usize=11 copied=5
(5) kern='cccccbbbb' ksize=5 user='ccccc ' usize=6 copied=5
(1) kern='cccccbbbb' ksize=5 user=' ' usize=1 copied=0
(9) kern='ccccccccc' ksize=9 user='cccccccccc ' usize=11 copied=9
(2) kern='c' ksize=9 user='c ' usize=2 copied=2
(10) kern='cccccccccc' ksize=10 user='cccccccccc ' usize=11 copied=10
(1) kern='cccccccccc' ksize=10 user=' ' usize=1 copied=0
(11) kern='cccccccccc' ksize=11 user='cccccccccc ' usize=11 copied=10
(11) kern='cccccccccc' ksize=20 user='cccccccccc ' usize=11 copied=10
(1) kern='dccccccccc' ksize=1 user='ddddddddddd ' usize=12 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddddd ' usize=11 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddddd ' usize=10 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddd ' usize=9 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddd ' usize=8 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddd ' usize=7 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddd ' usize=6 copied=1
(1) kern='dccccccccc' ksize=1 user='dddd ' usize=5 copied=1
(1) kern='dccccccccc' ksize=1 user='ddd ' usize=4 copied=1
(1) kern='dccccccccc' ksize=1 user='dd ' usize=3 copied=1
(1) kern='dccccccccc' ksize=1 user='d ' usize=2 copied=1
(1) kern='dccccccccc' ksize=1 user=' ' usize=1 copied=0
(5) kern='dddddccccc' ksize=5 user='ddddddddddd ' usize=12 copied=5
(5) kern='dddddccccc' ksize=5 user='dddddd ' usize=7 copied=5
(2) kern='d' ksize=5 user='d ' usize=2 copied=2
(9) kern='dddddddddc' ksize=9 user='ddddddddddd ' usize=12 copied=9
(3) kern='dd' ksize=9 user='dd ' usize=3 copied=3
(10) kern='dddddddddd' ksize=10 user='ddddddddddd ' usize=12 copied=10
(2) kern='d' ksize=10 user='d ' usize=2 copied=2
(11) kern='ddddddddddd' ksize=11 user='ddddddddddd ' usize=12 copied=11
(1) kern='ddddddddddd' ksize=11 user=' ' usize=1 copied=0
(12) kern='ddddddddddd' ksize=20 user='ddddddddddd ' usize=12 copied=12

test 4
(2) kern='a' ksize=1 user=' a ' usize=3 copied=1
(1) kern='a' ksize=1 user=' ' usize=1 copied=0
(3) kern='a' ksize=5 user=' a ' usize=3 copied=2
(3) kern='a' ksize=9 user=' a ' usize=3 copied=2
(3) kern='a' ksize=10 user=' a ' usize=3 copied=2
(3) kern='a' ksize=11 user=' a ' usize=3 copied=2
(3) kern='a' ksize=20 user=' a ' usize=3 copied=2
(2) kern='b' ksize=1 user=' bbbbbbbbb ' usize=11 copied=1
(1) kern='b' ksize=1 user='bbbbbbbb ' usize=9 copied=1
(1) kern='b' ksize=1 user='bbbbbbb ' usize=8 copied=1
(1) kern='b' ksize=1 user='bbbbbb ' usize=7 copied=1
(1) kern='b' ksize=1 user='bbbbb ' usize=6 copied=1
(1) kern='b' ksize=1 user='bbbb ' usize=5 copied=1
(1) kern='b' ksize=1 user='bbb ' usize=4 copied=1
(1) kern='b' ksize=1 user='bb ' usize=3 copied=1
(1) kern='b' ksize=1 user='b ' usize=2 copied=1
(1) kern='b' ksize=1 user=' ' usize=1 copied=0
(6) kern='bbbbb' ksize=5 user=' bbbbbbbbb ' usize=11 copied=5
(5) kern='bbbb' ksize=5 user='bbbb ' usize=5 copied=5
(10) kern='bbbbbbbbb' ksize=9 user=' bbbbbbbbb ' usize=11 copied=9
(1) kern='bbbbbbbbb' ksize=9 user=' ' usize=1 copied=0
(11) kern='bbbbbbbbb' ksize=10 user=' bbbbbbbbb ' usize=11 copied=9
(11) kern='bbbbbbbbb' ksize=11 user=' bbbbbbbbb ' usize=11 copied=9
(11) kern='bbbbbbbbb' ksize=20 user=' bbbbbbbbb ' usize=11 copied=9
(2) kern='cbbbbbbbb' ksize=1 user=' cccccccccc ' usize=12 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccccc ' usize=10 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccccc ' usize=9 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccccc ' usize=8 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccccc ' usize=7 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccccc ' usize=6 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cccc ' usize=5 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='ccc ' usize=4 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='cc ' usize=3 copied=1
(1) kern='cbbbbbbbb' ksize=1 user='c ' usize=2 copied=1
(1) kern='cbbbbbbbb' ksize=1 user=' ' usize=1 copied=0
(6) kern='cccccbbbb' ksize=5 user=' cccccccccc ' usize=12 copied=5
(5) kern='cccccbbbb' ksize=5 user='ccccc ' usize=6 copied=5
(1) kern='cccccbbbb' ksize=5 user=' ' usize=1 copied=0
(10) kern='ccccccccc' ksize=9 user=' cccccccccc ' usize=12 copied=9
(2) kern='c' ksize=9 user='c ' usize=2 copied=2
(11) kern='cccccccccc' ksize=10 user=' cccccccccc ' usize=12 copied=10
(1) kern='cccccccccc' ksize=10 user=' ' usize=1 copied=0
(12) kern='cccccccccc' ksize=11 user=' cccccccccc ' usize=12 copied=11
(12) kern='cccccccccc' ksize=20 user=' cccccccccc ' usize=12 copied=11
(2) kern='dccccccccc' ksize=1 user=' ddddddddddd ' usize=13 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddddd ' usize=11 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddddd ' usize=10 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddddd ' usize=9 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddddd ' usize=8 copied=1
(1) kern='dccccccccc' ksize=1 user='dddddd ' usize=7 copied=1
(1) kern='dccccccccc' ksize=1 user='ddddd ' usize=6 copied=1
(1) kern='dccccccccc' ksize=1 user='dddd ' usize=5 copied=1
(1) kern='dccccccccc' ksize=1 user='ddd ' usize=4 copied=1
(1) kern='dccccccccc' ksize=1 user='dd ' usize=3 copied=1
(1) kern='dccccccccc' ksize=1 user='d ' usize=2 copied=1
(1) kern='dccccccccc' ksize=1 user=' ' usize=1 copied=0
(6) kern='dddddccccc' ksize=5 user=' ddddddddddd ' usize=13 copied=5
(5) kern='dddddccccc' ksize=5 user='dddddd ' usize=7 copied=5
(2) kern='d' ksize=5 user='d ' usize=2 copied=2
(10) kern='dddddddddc' ksize=9 user=' ddddddddddd ' usize=13 copied=9
(3) kern='dd' ksize=9 user='dd ' usize=3 copied=3
(11) kern='dddddddddd' ksize=10 user=' ddddddddddd ' usize=13 copied=10
(2) kern='d' ksize=10 user='d ' usize=2 copied=2
(12) kern='ddddddddddd' ksize=11 user=' ddddddddddd ' usize=13 copied=11
(1) kern='ddddddddddd' ksize=11 user=' ' usize=1 copied=0
(13) kern='ddddddddddd' ksize=20 user=' ddddddddddd ' usize=13 copied=12