#include <vector>
#include <iostream>
 
int main() {
 
	std::vector<char> vStr1Even, vStr2Third;
 
	std::cin >> std::noskipws;
 
	char cTmp;
	for (size_t idx = 1U; std::cin >> cTmp && cTmp != '\n'; ++idx) {
		if (!(idx & 1U)) {
			vStr1Even.push_back(std::move(cTmp));
		}
		if (!(idx % 3U)) {
			vStr2Third.push_back(std::move(cTmp));
		}
	}
 
	for (auto xCh : vStr1Even) {
		std::cout << xCh;
	}
 
	std::cout << std::endl;
 
	for (auto xCh : vStr2Third) {
		std::cout << xCh;
	}
 
	std::cout << std::endl;
 
	return 0;
}

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