#include <iostream>
#include <string>
using namespace std;

int main(){
	string oldString, newString, words[2];
	cout << "old string :\n";
	getline(cin, oldString);
	oldString += ' ';
	int pos = oldString.find(" ");
	words[0] = oldString.substr(0, pos+1);
	words[1] = oldString.substr(pos+1, oldString.length());
	newString = words[1] + words[0];
	cout << newString << endl;
	system("pause");
	return 0;
}