#include <iostream>
#include <algorithm>
#include <string>
using namespace std;

int main(){
    int key=0,A,B;
   for(int i=0;i<3;i++){
     cin >> A >> B;
     key += A^B;
   }
  if(key%2==0)cout << ":-)" << endl;
  else cout << ":-(" << endl;
}