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

class RelationClassifier
{
	public:	string isBijection(vector <int> domain, vector <int> range)
	{
		for(int i = 0; i < domain.size(); i++)
			for(int j = i+1; j < domain.size(); j++)
				if(domain[i] == domain[j] || range[i] == range[j])
					return "Not";
		return "Bijection";
	}
};