#include <bits/stdc++.h>
#define rep(i,n) for(int i=(0);i<(n);i++)

using namespace std;

typedef long long ll;

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	ll a[3], b[3];
	cin >> a[0] >> b[0] >> a[1] >> b[1] >> a[2] >> b[2];

	if((a[0] + a[1] + a[2]) % 2 == 0){
		cout << ":-)" << endl;
	}else{
		cout << ":-(" << endl;
	}

}