/*********************************************************************\
      |        _            ____     _          _           ____      |
     / \      | \     |    /    \   | \     |  | \     |   /    \     |
    /   \     |  \    |   /      \  |  \    |  |  \    |  /      \    |
   /-----\    |   \   |  |        | |   \   |  |   \   | |        |   |
  /       \   |    \  |   \      /  |    \  |  |    \  |  \      /    |
 /         \  |     \_|    \____/   |     \_|  |     \_|   \____/     |
                                                                      |
                                                                      |
    codeforces: safayet007 || codechef: saf1ano2_1234                 |
    BUET EEE '17                                                      |
                                                                      |
**********************************************************************/


#include <stdio.h>

int strrlen(char *str)
{
    int length = 0, i;
    for(i = 0; *(str + i); i++)
    {
        length++;
    }
    return length;
}

int main() {
    char text[500];
    gets(text);
    printf("%d\n", strlen(text));
    return 0;
}