function countOccurences(arr, val) {
    return arr.reduce((a,v) => (v === val ? a + 1 : a), 0);
}

function scramble(str1, str2) {
    str1 = str1.split('')
    str2 = str2.split('')
    var arr = [];
    for(el of str1) {
        if (countOccurences(arr, el) < countOccurences(str2, el)) {
            arr.push(el);
        }
    }
    return arr.length === str2.length
}