#include<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include <cmath>
#include <limits>
#include<set>
#include <iomanip>
#include <queue>
#pragma GCC optimize("Ofast")
using namespace std;
const long long INF=20000000000;
//setprecision(2) <<

const int MOD = 1000000007;

long long max(long long a,long long b){
	if(a<b)return b;
	else return a;	
}
long long min(long long a,long long b){
	if(a>b)return b;
	else return a;	
}

set<long long>s;


int main(){
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int a,b,c,d,e,f;
	cin>>a>>b>>c>>d>>e>>f;
	if((a+c+e)%2==0)cout<<":-)"<<endl;
	else cout<<":-("<<endl;
}