#include <bits/stdc++.h>
using namespace std;
#define int long long
signed 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;
    }
  }
}