Get Puzzle Type from a Scramble

scramble.js

function whatPuzzle(scramble) {
    const cubePattern2x2 = /^([UFR]'?|2? ?)+$/;
    const cubePattern3x3 = /^([RLUDFB]'?|2? ?)+$/;
    const cubePattern4x4or5x5 = /^([RLUDFBwxyz]'?|2? ?)+$/;
    const cubePattern6x6or7x7 = /^([3RLUDFBw]'?|2? ?)+$/;
    const clockPattern = /^([AURDLFBy0-9+\-*]+ ?)+$/;
    const megaminxPattern = /^([RDU'+\-\s]+)+$/;
    const pyraminxPattern = /^([LUBR'brlu\s]+)+$/;
    const skewbPattern = /^(?:[LUBR'\s]+)$/;
    const squanPattern = /^[\(\-\d,\)\/\s]+$/;

    if (cubePattern2x2.test(scramble)) {
        return "222";
    } else if (cubePattern3x3.test(scramble)) {
        if (skewbPattern.test(scramble)) {
            return "skewb";
        } else if (scramble.trim().startsWith("R' U' F") && scramble.trim().endsWith("R' U' F")) {
            return "333fm";
        } else {
            return "333";
        }
    } else if (cubePattern4x4or5x5.test(scramble)) {
        if (scramble.split("w").length - 1 <= 2) {
            return "333bf";
        } else if (scramble.split(" ").length === 60) {
            return "555";
        } else if (scramble.includes('x') || scramble.includes('y') || scramble.includes('z')) {
            return "444bf";
        } else {
            return "444";
        }
    } else if (cubePattern6x6or7x7.test(scramble)) {
        if (scramble.split("3").length - 1 <= 2) {
            return "555bf";
        } else if (scramble.split(" ").length === 100) {
            return "777";
        } else {
            return "666";
        }
    } else if (clockPattern.test(scramble)) {
        return "clock";
    } else if (megaminxPattern.test(scramble)) {
        return "minx";
    } else if (pyraminxPattern.test(scramble)) {
        return "pyram";
    } else if (squanPattern.test(scramble)) {
        return "sq1";
    } else {
        return "invalid";
    }
}

// EXAMPLE USE:
// const scramble1 = ` (0,-4)/ (-2,-5)/ (-1,2)/ (0,-3)/ (-5,-5)/ (-3,0)/ (-4,0)/ (3,0)/ (6,0)/ (0,-1)/ (-2,0)/`;
// console.log(whatPuzzle(scramble1)); 

// Console Output: "sq1"

Super interesting function and case structure.
5BLD scrambles will have 3Rw or 3Uw in the end.

MBLD is a standalone event, it does not need differentiation.