#include <algorithm>
#include <cstring>
#include <iostream>
#include <iterator>
#include <string>

using namespace std;

int main() {
	const auto bar = 13U;
	string foo;
	
	generate_n(back_inserter(foo), bar * 3, [](){
		static const char multiplicand[] = "0, ";
		static const auto length = strlen(multiplicand);
		static auto i = 0U;
		return multiplicand[i++ % length];});
	
	cout << foo;
}