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

int main() {
  string R = "abcdefghijklmnopqrstuvwxyz";
  string S; cin >> S;
  for(int i = 0; i < 26; i++){
    if(R[i] != S[i]){
      cout << R[i] << "to" << S[i] << endl;
    }
  }
}