import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		char[] text = input.next().toCharArray();
		for (int i = 0; i < text.length; i++) {
			if (text[i] != 'a' + i) {
				System.out.println((char)('a' + i) + "to" + text[i]);
			}
		}
	}
}