PROGRAMMING:Find the number of digits in the string
At least how many positive integers are in the output string.
###Input format:
Enter a string on one line. The length of the string is not more than 100000.
###Output format:
The number of digits in the output string.
###Input example:
```in
ab12cdefg12hijkl1012mno2123pqrst12uvw123xy123zA
```
###Output example:
```out
seven
```
answer：If there is no answer, please comment
###Input format:
Enter a string on one line. The length of the string is not more than 100000.
###Output format:
The number of digits in the output string.
###Input example:
```in
ab12cdefg12hijkl1012mno2123pqrst12uvw123xy123zA
```
###Output example:
```out
seven
```
answer：If there is no answer, please comment