#include<bits/stdc++.h>
using namespace std;
int main(){
string s1,s2,s3;
int n;
cin>>s1>>s2>>n;
s3=s2+s1;
cout<<s3;
	return 0;
}

/**************************************************************
	Problem: 2020
	User: huxuanchen
	Language: C++
	Result: Wrong Answer
****************************************************************/