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

int main(){
    int cnt=0;
    for(int i=0; i<3; i++){
        int a,b;
        cin >> a >> b;
        if(a%2 == 1) cnt++;
    }
    if(cnt%2==0) cout << ":-)" << endl;
    else cout << ":-(" << endl;
}