#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>
#include <set>
#include <iterator>


using namespace std;

ifstream in("input.txt");
ofstream out("output.txt");


int main()

{
	int c = 0;
	int i;
	vector < int > v;
	set < int > set;
	while (in >> i)

	{
		v.push_back(i);
	}

	int a = 0, b = 0;

	copy(v.begin(), v.end(), ostream_iterator <int>(out, " "));

	out << endl;

	for (int i = 0; i < v.size(); i++)
	{
		int m = set.size();
		int k = abs(v[i]);

		while (k>0)
		{
			a = k % 10;
			k = k / 10;
			set.insert(a);

			if (set.size() > m)
			{
					
						out << a << " ";
						out << endl;
						m = set.size();
						c++;
					
			}
		}
	}
	return 0;

}