#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define MAX 101

int lengthrecursive(char *string)
{
        if(*string=='\0')
            return 0;
        else
            return 1+lengthrecursive(string+1);
}

int main()
{
    char string[MAX];
    gets(string);

    printf("%d",lengthrecursive(string));
    return 0;
}