import std.stdio : writeln;
import std.algorithm.iteration : map;
import std.array : join;
import std.range : chunks;

int main(string[] args)
{
	bool[] data = [1,0,1,0,1,1,0,1,1,0,0,0,1,1,0,1];
	data.map!(x => x ? '1' : '0').chunks(4).join(' ').writeln;

	return 0;
}