function solution52() {
    let x = 0;
    for (let i = 10 ; i < Infinity; i++) {
        x = i;
        const multiples = [2 * x, 3 * x, 4 * x, 5 * x, 6 * x];
        const digits = getDigits(x);
        const multiplesDigits = multiples.map(getDigits);

        if (checkForPermutation(digits, multiplesDigits)) {
          break;
        }
    }

    function checkForPermutation(num, multiples) {
        return multiples.every( multiplesDigitArr => multiplesDigitArr.every( digit => num.includes(digit)));
    }

    function getDigits(num) {
        const numArr = num.toString().split('')
        return numArr.map( digit => +digit);
    }

    return x;
  }