package main

import "fmt"

func main() {

	r := ""
	for i := 'a'; i <= 'z'; i++ {
		r += string(i)
	}
	var s string
	fmt.Scan(&s)

	for i, _ := range s {
		if r[i] != s[i] {
			fmt.Println(string(r[i]) + "to" + string(s[i]))
		}
	}
}