#include <bits/stdc++.h>
using namespace std;
#define int long long
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rrep(i,n) for(int (i)=((n)-1);(i)>=0;(i)--)
#define itn int
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
const long long INF = 1LL << 60;
const int MOD = 1000000007;
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
signed main(void){
    itn a,b,c,d,e,f; cin>>a>>b>>c>>d>>e>>f;
    itn cnt = 0;
    if(a %2 == 1) cnt++; if(c %2 == 1) cnt++; if(e %2 == 1) cnt++;
    if(cnt %2 == 0) cout<<":-)"<<endl;
    else cout<<":-("<<endl;
}