#include <stdio.h>

int main(void){
	char sample[100] = "abcdefghijklmnopqrstuvwxyz";
	char str[100] = "a";
	scanf("%s",str);
	for(int i = 0 ; i < 26;i++){
		if(sample[i] != str[i]){
			printf("%cto%c",sample[i],str[i]);
		}
	}
}