function bubble(arr) {

        var len = arr.length - 1;

        for (let i = 0 ; i < len; i++) {

            var bool = true;

            for (let j = 0; j < len - i; j++) {

                if (arr[j] > arr[j]+1) {

                    [arr[j], arr[j+1]] = [arr[j+1], arr[j]];

                    bool = false;

                }

            }

            if (bool) break;

        }

        return arr;

    }

    function select(arr) {

        var len = arr.length - 1, temp;

        for (var i = 0; i < len; i++) {

            for (var j = 0; j < len - i; j++) {

                if (arr[i] > arr[j]) {

                    temp = arr[i];

                    arr[i] = arr[j];

                    arr[j] = temp;

                }

            }

        }

        return arr;

    }

    function insert(arr) {

        var len = arr.length;

        for (var i = 1; i < len; i++) {

            var temp = arr[i];

            for (var j = i -1; j >= 0; j--) {

                if (arr[j] > temp) {

                    arr[j + 1] = arr[j];

                } else {

                    break;

                }

            }

            arr[j+1] = temp;

        }

        return arr;

    }