19<br>Array
(
    [4] => 6
    [5] => 5
    [6] => 5
    [7] => 4
    [8] => 4
    [9] => 4
    [10] => 3
    [11] => 3
    [12] => 3
    [13] => 2
    [14] => 2
    [15] => 2
    [16] => 2
    [17] => 1
    [18] => 1
    [19] => 1
    [20] => 1
    [21] => 1
    [22] => 1
)