#include <stdio.h>
#include <math.h>

int main(){
   int a[3];
   int b[3];
   for(int i = 0;i < 3;i++)scanf("%d %d ",&a[i],&b[i]);
   if((a[0] + a[1] + a[2]) % 2 == 0)printf(":-)\n");
   else printf(":-(\n");
}