#include <stdio.h>
#include <string.h>
void main(void){
	char summerList[3][1000] ={"watermelon","beachball","shrinebell"};
	int countList[3] = {0,0,0};
	char s[1000] = "a";
	scanf("%s",s);
	for(int i = 0 ; i < 3 ; i++){
		if(strcmp(s,summerList[i])== 0){
			countList[i]++;
			break;
		}
	}
	char t[1000] = "a";
	scanf("%s",t);
	for(int i = 0 ; i < 3 ; i++){
		if(strcmp(t,summerList[i])== 0){
			countList[i]++;
			break;
		}
	}
	for(int i = 0 ; i < 3 ; i++){
		if(countList[i] == 0){
			printf("%s",summerList[i]);
			break;
		}
	}
}