Points:
1000 (p)
Time limit:
1.0s
Memory limit:
512M
Input:
stdin
Output:
stdout
Given a string, your task is to generate all different strings that can be created using its characters.
Input
- The only input line has a string of length \(n\). Each character is between
a
-z
.
Output
- First print an integer \(k\): the number of strings. Then print \(k\) lines: the strings in alphabetical order.
Constraints
- \(1 \leq n \leq 8\)
Example
Sample input
aabac
Sample output
20
aaabc
aaacb
aabac
aabca
aacab
aacba
abaac
abaca
abcaa
acaab
acaba
acbaa
baaac
baaca
bacaa
bcaaa
caaab
caaba
cabaa
cbaaa
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