#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class CatchTheBeatEasy {
  public:
    string ableToCatchAll(vector <int> x, vector <int> y);
};

string CatchTheBeatEasy::ableToCatchAll(vector <int> x, vector <int> y)
{
  return "";
}