#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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