#include <iostream>
#include <sstream>
#include <string>
#include <algorithm>

using namespace std;

int main() {
	int n;
	while( cin >> n )
	{
		cout << n << " => ";
		stringstream ss;
		ss << n;
		string s;
		ss >> s;
		if( next_permutation( s.begin(), s.end() ) )
			cout << s << endl;
		else
			cout << "Не вийшло" << endl;
	}
	return 0;
}