#include <iostream>
#include <string>
#include<vector>
using namespace std;

int main() {
    int len = 0;
    string input;
    vector<string> test_char;
    while(cin>>input){
         test_char.push_back(input);   
    }
    cout<<test_char[test_char.size()-1].size()<<endl;
}
// 64 位输出请用 printf("%lld")