#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  cin >> s;
  string t = "abcdefghijklmnopqrstuvwxyz";
  for (int i = 0; i < s.size(); i++) {
    if (s[i] != t[i]) {
      cout << t[i] << "to" << s[i] << endl;
    }
  }
  return 0;
}