#include <stdio.h>

void main(void){
	long long int tapioka ,factorial;
    int enenOddList[3] = {};
	for(int i = 0 ; i < 3 ; i ++){
		scanf("%lld %lld",&tapioka,&factorial);
        if(tapioka%2 == 0){
            enenOddList[i] = 0;
        }else{
            enenOddList[i] = 1;
        }
	}
    int result = 0;
    for(int i = 0 ; i < 3 ; i++){
        result += enenOddList[i];
    }	

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