#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }

const long long MAX = 510000;
const long long INF = 1LL << 60;
const long long MOD = 1000000007LL;

using namespace std;
typedef unsigned long long ull;
typedef  long long ll;


int main()
{
	ll a[3], b[3];
	for (ll i = 0; i < 3; i++) {
		cin >> a[i] >> b[i];
	}
	ll sum = 0;
	for (ll i = 0; i < 3; i++) {
		sum += a[i];
	}
	if (sum & 1) {
		puts(":-(");
	}
	else {
		puts(":-)");
	}
	return 0;
}