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

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