#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using ll =  long long ;
using P = pair<ll,ll> ;
const ll INF = 10000000000;
const int MOD = 1000000007;

int main(){
    vector<int> a(6);
    rep(i,6) cin >> a[i];
    if((a[0]+a[2]+a[4])%2 == 0) cout << ":-)" << endl;
    else cout << ":-(" << endl;
    return 0;
}