Array
(
    [0] => A
    [2] => C
    [4] => E
    [6] => G
    [8] => I
    [10] => K
    [12] => M
    [14] => O
    [16] => Q
    [18] => S
    [20] => U
    [22] => W
    [24] => Y
    [26] => [
    [28] => ]
    [30] => _
    [32] => a
    [34] => c
    [36] => e
    [38] => g
    [40] => i
    [42] => k
    [44] => m
    [46] => o
    [48] => q
    [50] => s
    [52] => u
    [54] => w
    [56] => y
)