#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

void solve() {
  string s;
  cin >> s;
  rep(i, 0, s.size()) if (s[i] != 'a' + i) {
    cout << char('a' + i) << "to" << s[i] << endl;
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  solve();
  getchar();
}