#include <stdio.h>

void main(void){
	long long int a, b;
	int count = 3;
	for(int i = 0 ; i < 3 ; i ++){
		scanf("%lld %lld",&a,&b);
		if(a%2 == 0 || a%2 != 0 && b%2 == 0){
			count--;
		}
	}	

	if(count%2 == 0){
		printf(":-)");
	}else{
		printf(":-(");
	}
}