#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int a,b;
  int cnt=0;
  rep(i,3){
    cin>>a>>b;
    if(a%2==1)cnt++;
  }
  cout<<(cnt%2==0?":-)":":-(")<<endl;
}