#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
    string s,m;
    cin>>s>>m;
    cout<<s+m;
    return 0;
}

#include <iostream>
#include <cstdio>
using namespace std;
string CCTV3(string a,string b)
{
    return a+b;
}
int main()
{
    string s,m;
    cin>>s>>m;
    cout<<CCTV3(s,m);
    return 0;
}