#include <iostream>
#include <string.h>
using namespace std;

int main() {
    string str;
    int str_l = 0;
    int len = 0;

    getline(cin, str);
    str_l = str.length();
    for (int i = str_l - 1; i >= 0; i--)
    {
        if (str[i] == ' ')
            break;

        len += 1;
    }
    cout << len;

}
// 64 位输出请用 printf("%lld")