#include<stdio.h>

int main(void){
    
    int A[3],B[3];
    scanf("%d%d%d%d%d%d",&A[0],&B[0],&A[1],&B[1],&A[2],&B[2]);
    
    int Y[3];
    Y[0] = A[0]%2; Y[1] = A[1]%2; Y[2] = A[2]%2;
    int sum =Y[0]+Y[1]+Y[2];
    
    if(sum%2==0){
        printf(":-)\n");}
    else {
        printf(":-(\n");}
    return 0;
}