var comparator = (a, b) => a - b;

for (var i = 0; i < 1e4; ++i) {
    [
        0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,31,30,29,28,27,26,25,24,23,22,21,20,19,
        18,17,16,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,63,62,61,60,59,58,57,
        56,55,54,53,52,51,50,49,48
    ].sort(comparator);
}