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;
}
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