#include <iostream>
	#include <set>
	#include <sstream>
 
	int main()
	{
		std::string line;
		while(std::getline(std::cin, line))
		{
			std::stringstream ss(line);
			std::string number;
			std::set<std::string> numbers;
			while(ss >> number)
				numbers.insert(number);
			for(const auto& n: numbers)
				std::cout << n;
			std::cout << ' ';
			for(auto it = numbers.rbegin(); it != numbers.rend(); it++)
				std::cout << *it;
			std::cout << std::endl;
		}
	}

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NzkgODIgMzQgODMgNjkKNDIwIDM0IDE5IDcxIDM0MQoxNyAzMiA5MSA3IDQ2

79 82 34 83 69
420 34 19 71 341
17 32 91 7 46