include

include

using namespace std; int main() {

int n;
cin>>n;
string longest_name="";
for (int i=0;i<n;i++) {
    string name;
    cin>>name;
    if(name.length()>longest_name.length()){
        longest_name=name;
    }
}
cout<<longest_name<<endl;
return 0;

}