#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define UNIQUE(v) v.erase( unique(v.begin(), v.end()), v.end() );
using namespace std;
using ll = long long;

int main(){
    ll a, b;
    ll sum = 0;
    rep(i, 3){
        cin >> a >> b;
        sum += pow(a, b);
    }

    if(sum%2 == 0) cout << ":-)" << endl;
    else cout << ":-(" << endl;
}