#include <bits/stdc++.h>
using namespace std;

int main(){
  int  a[6];
  double b,c,d;
  for(int i=0;i<6;i++){
    cin >> a[i];
  }
 b = pow(a[0],a[1]);
 c = pow(a[2],a[3]);
 d = pow(a[4],a[5]);
 if((long long int)(b+c+d)%2==0){
   cout << ":-)"<<endl;
 }else{
   cout << ":-("<<endl;
 }
return 0;
}