#include <bits/stdc++.h>

using namespace std;

int main() {
    string s;
    cin >> s;
    for (int i = 0; i < 27; i++) {
        if (s.at(i) != char(97 + i)) {
            cout << char(97 + i) << "to" << s.at(i) << endl;
        }
    }

    return 0;
}