#include <iostream>

using namespace std;

int fibonacci(int num) {
    if (num == 0) return 0;
    else if (num == 1) return 1;
    return fibonacci(num - 1) + fibonacci(num - 2);
}

int main() {
  for(int i = 0; i <= 19; i++) {
    cout << fibonacci(i) << ", ";
  }
  return 0;
}