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

int main() 
{
	string wort;
	while(cin >> wort)
	{
		try
		{
			int i;
			size_t num_converted;
			i = stoi(wort, &num_converted);
			if (num_converted == wort.size())
				cout << showbase << hex << i << endl;
		} catch (invalid_argument){};
	}
}