/* ex_2_4.c++ */
#include <iostream>
#include <string>
using namespace std;

void my_aff_car(const string s, int indice_debut = 0, int step = 2) {
	for (int i=indice_debut ;  i<s.length() ; i+=step) {
		cout << s[i]; 
	}
 	cout << endl;   
}

int main () {
	string s_in;
	getline (cin, s_in);
	my_aff_car(s_in);
	my_aff_car(s_in, 1);
	my_aff_car(s_in, 2, 3);
	return 0;
}