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Problem 1559. -- [JSOI2009]密码

1559: [JSOI2009]密码

Time Limit: 5 Sec  Memory Limit: 64 MB
Submit: 1071  Solved: 378
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Description

Input

Output

Sample Input

10 2
hello
world

Sample Output

2
helloworld
worldhello

HINT

Source

JSOI2009Day1

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