#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <random>
#include <cassert>
#include <fstream>
#include <utility>
#include <functional>
#define popcount __builtin_popcount
using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

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