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RGB7307 - Тоон дахь бага цифр

Өгөгдсөн тоон дахь бага цифрийг ол.

Input

Бүхэл тоо өгөгдөнө.

Output

Бага цифр

Example

Input:
9649

Output:
4
Submit solution!
Added by:Bataa
Date:2013-01-09
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:NCSHARP C++ 4.3.2 CPP CPP14 JULIA PYPY3
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