#include <bits/stdc++.h>
using namespace std;
#define REP(i,a) for(int i = 0; i < (a); i++)
#define ALL(a) (a).begin(),(a).end()
typedef long long ll;
typedef pair<int, int> P;
const int INF = 1e9;
const int MOD = 1e9 + 7;

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