#include <iostream>
#include <cmath>

int main(void){
  int a1,a2,a3,b1,b2,b3;
  long long sum;
  std::cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;;
  sum = std::pow(a1,b1)+std::pow(a2,b2)+std::pow(a3,b3);
  if(sum%2==0) std::cout << ":-)" << std::endl;
  if(sum%2==1) std::cout << ":-(" << std::endl;
}