#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000000000000001

vector<long long> get(vector<long long> a,vector<long long> b){
	long long m = -Inf;
	rep(i,a.size()){
		m = max(m,min(a[i],b[i]));
	}
	a.push_back(m);
	a.erase(a.begin());
	return a;
	
}

int main(){
	
	long long K,N;
	cin>>K>>N;
	
	vector<long long> A(K),B(K);
	rep(i,K)cin>>A[i];
	rep(i,K)cin>>B[i];
	
	if(N<K){
		cout<<A[N]<<endl;
		return 0;
	}
	
	N -= K-1;
	
	long long n = N;
	vector<vector<long long>> temp(1,A);
	bool f = false;
	while(true){
		if(n==0){
			f=true;
			cout<<temp.back().back()<<endl;
			return 0;
		}
		n--;
		
		auto t = get(temp.back(),B);
		rep(i,temp.size()){
			if(temp[i]==t){
				temp.erase(temp.begin(),temp.begin()+i);
				goto L;
			}
		}
		temp.push_back(t);
	}
	L:;
	cout<<temp[n%temp.size()].back()<<endl;
	
	
    return 0;
}