PROGRAMMING:Count the number of numeric characters in the string

Enter a string to count the number of numeric characters in the string.
###Input format:
Enter a string that is not more than 80 long and ends with a carriage return.
###Output format:
Number of output numeric characters
###Input example:
For example:
```in
Hello567 World89!
```
###Output example:
```out
five
```







answer：If there is no answer, please comment