#include <iostream>

using namespace std;

int main(){
    int A[3], B[3];
    int n = 0;
    for(int i = 0; i < 3; i++){
        cin >> A[i] >> B[i];
        if(A[i] %2 == 1) n++;
    }
    if(n%2 == 0){
        cout << ":-)" << endl;
    }else{
        cout << ":-(" << endl;
    }
}