#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;


int main(){
    int a1, b1, a2, b2, a3, b3, t;
    cin >> a1 >> b1 >> a2 >> b2 >> a3 >> b3;
    t = a1%2 + a2%2 + a3%2;
    if(t%2) cout << ":-(" << endl;
    else cout << ":-)" << endl;
}