#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
using namespace std ;
int main()
{
string line ;
int noOfVar,noOfCubes ;
getline(cin,line) ;
istringstream iss(line) ;
iss >> noOfVar ;
getline(cin,line) ;
iss.str(line) ;
iss >> noOfCubes ;
cout << noOfCubes ;
cout << noOfVar ;
return 0 ;
}
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