#include <iostream>

using namespace std;

int main() {

string n[1000];

int i = 0;

while (cin >> n[i]) {

i++;

}

double m = i;

for (int j = 0; j <3; j++) {

for (int k = 0; k <m/3 ; k++) {

cout << n[j+k*3]<<" ";

}

cout << "\n";

}

}