Problem

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Number of digits

Problem

You are given a string containing numbers and English letters (uppercase and lowercase). Find and display the number of digits.
 
Input
A string of non-zero length is entered. It is also known that the string length does not exceed 1000 characters.
 
Output
Print the number of digits present in the string.

Examples
# Input Output
1 74kz31n8pn26f2iv10c7u8x356gl73jlka67i929z08i5mnn35h0n 28

time 1000 ms
memory 256 Mb
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