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Description

输入一行字符，长度不超过 100，请你统计一下其中的数字字符的个数。

Input

输入一行字符。注意其中可能包含空格。

Output

输出一个整数，表示字数字字符的个数。

Samples

I am 18 years old this year.

2

Limitation

1s, 1024KiB for each test case.