#include<bits/stdc++.h>
using namespace std;

int main(){
    int N, a, b, c, d;
    string R;
    vector<int> v(10,0);

    cin >> N;
    for(int i=0;i<N;i++){
        cin >> a >> b >> c >> d >> R;
        if(R=="YES"){
            if(v[a]!=-1) v[a]+=1;
            if(v[b]!=-1) v[b]+=1;
            if(v[c]!=-1) v[c]+=1;
            if(v[d]!=-1) v[d]+=1;
        }else{
            v[a]=-1;
            v[b]=-1;
            v[c]=-1;
            v[d]=-1;
        }
    }

    vector<int>::iterator iter = max_element(v.begin(),v.end());

    cout << distance(v.begin(),iter) << endl;

    return 0;
}