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2486 wo shi yi dao pingyin ti

Time Limit : 2000/1000 MS(Java/Others) | Memory Limit : 65536/32768 KB(Java/Others)

Submits : 2 | Solved : 0

Description

ufde zfeafe  esp dfx zq lww esp yfxmpc tyafe ,ufde slgl qfy.

Input

1 1

Output

Sample Input

1 2

Sample Output

HINT

Source

NBU OJ

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