#include <iostream>
using namespace std;
int main() {
int n;
cin>>n;
string a[n];
for(int i=0; i<n; i++)
cin>>a[i];
int mxk=0, k=1;
string s=a[0];
for(int i=1; i<n; i++){
if(a[i][0]==a[i-1][0]){
k++;
} else k=1;
if(k>=mxk){
mxk=k;
s=a[i];
} else if (k==mxk){
s=a[i];
}
}
cout<<s<<endl;
}
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