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

int main() {
	string aBinaryIPAddress = "0101100111101101";
	size_t len = aBinaryIPAddress.size();
	for (int i = 0 ; i != 4 ; i++) {
		cout << "Digit " << i << ": " << aBinaryIPAddress.substr(len-4*(i+1), 4) << endl;
	}
	return 0;
}