what1

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

int main() {
    string s1, ans;
    cin >> s1;
    for (int i = 2; i < s1.size(); i += 3) {
        char ch;
        int n = stoi(s1.substr(i - 2, 2));
        ch = n;
        ans += ch;
    }
    cout << ans;
    return 0;
}