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

int main() {
  string S;
  cin >> S;
  for (int i = 0; i < 26; i++) {
    char x = 'a' + i;
    char y = S.at(i);
    if (x != y) cout << x << "to" << y << "\n";
  }
}