#include <iostream>
#include<utility>
#include <vector>
#include <map>
#include<string>
#include<queue>
#include<math.h>
#define pb push_back
#define all(x) begin(x),end(x)
#define ll long long
#define P pair<int,int>
#define lP pait<ll,ll>
using namespace std;
int main() {
    bool f[]={1,1,1};
    for(int i=0;i<3;i++){
        ll a,b;
        cin>>a>>b;
        if(a%2==1 and b%2==1) f[i]=0;
    }
    if(f[0]+f[1]+f[2]==1 or f[0]+f[1]+f[2]==0)cout<<":-("<<endl;
    else cout<<":-)"<<endl;
    return 0;
}