#include <iostream>
#include <string>
using namespace std;
int main() {
	string S;
	cin >> S;
	//a 97
	for (int i = 0; i < 26; ++i) {
		
		if (S[i] != i + 97) {
			
			cout << static_cast <char>(i + 97) << "to" << S[i] << endl;
		}
	}
	

}