#include <iostream>
using namespace std; 

int main() {
	int luas_kandang=12; // Humaira Gathi Pranantya X4
	int bulan=1; 
    while(bulan <=3) {
    luas_kandang +=7;
    cout<<luas_kandang<<endl;
    bulan ++;
    }
	return 0;
}