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

int main() {
    string s1 = "hello";
    string s2 = "world";
    s1.append(s2, 1, 3);
    s2 = s1.substr(2, 5);
    cout << s2.size() + s2.find("or") << endl;
    return 0;
}