#include<iostream>
#include<string>
#include<queue>
#include<algorithm>
#include<map>
#include<set>
#include<vector>
#include<math.h>

using namespace std;

#define INF 1000000007
#define LINF (1LL << 62)

typedef long long i64;
typedef pair<i64,i64> P;


int a,b,c,d,e,f;

int main(){
	cin >> a >> b >> c >> d >> e >> f;
	
	if((a & 1) ^ (c & 1) ^ (e & 1)) cout << ":-(" << endl;
	else cout << ":-)" << endl;
	
	return 0;
}