#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int cmp(const void *a,const void *b){
    if(*(int*)a>*(int*)b){return 1;}
    else if(*(int*)a<*(int*)b){return -1;}
    else {return 0;}
}


int main(void){
int a,b,aa,bb,aaa,bbb;
int odd=0;
scanf("%d %d %d %d %d %d",&a,&b,&aa,&bb,&aaa,&bbb);

if(a%2==1){odd++;}
if(aaa%2==1){odd++;}
if(aa%2==1){odd++;}
if(odd==1||odd==3){printf(":-(\n");}
else{printf(":-)\n");}

}