#include "bits/stdc++.h"
#define ALL(obj) (obj).begin(),(obj).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define REP(i, n) for(int i = 0; i < int(n); i++)
#define FOR(i,n,m) for(int i = int(n); i < int(m); i++)
using namespace std;
typedef long long ll;
const int MOD = 1e9 + 7;
const int INF = MOD - 1;
const ll LLINF = 4e18;

int main() {
    int a[3], b[3];
    cin >> a[0] >> b[0] >> a[1] >> b[1] >> a[2] >> b[2];
    if (a[0] % 2 == 0 ^ a[1] % 2 == 0 ^ a[2] % 2 == 0) {
        puts(":-)");
    }
    else {
        puts(":-(");
    }
}