测试步骤3 - 1
from:
ab
to:
abc
测试步骤3 - 2
from:
ab
to:
cab
测试步骤4 - 1
from:
abc
to:
ab
测试步骤4 - 2
from:
abc
to:
bc
测试步骤5 - 1
from:
abcd
to:
dcba
测试步骤5 - 2
from:
abcd
to:
dcab
测试步骤5 - 3
from:
abgcdhef
to:
aghebf
测试步骤5 - 4
from:
aghebf
to:
abgcdhef
测试步骤5 - 5
from:
abgcdhef
to:
becdiaf
测试步骤5 - 6
from:
abcdefgh
to:
abtkdecijgh
from:
to:
图示
index:
-1
0
1
2
from:
a
b
to:
a
b
c
done:
a
b
c
过程
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