Array sort

Before sort

Array
(
    [1] => T
    [2] => K
    [3] => C
    [4] => y
    [5] => b
    [6] => W
    [7] => C
    [8] => u
    [9] => V
)

After sort

Array
(
    [0] => C
    [1] => C
    [2] => K
    [3] => T
    [4] => V
    [5] => W
    [6] => b
    [7] => u
    [8] => y
)