>= 128 && <= 143            8           '4'
>= 144 && <= 159            9           '5'
>= 160 && <= 175            10          '6'
>= 176 && <= 191            11          '7'
>= 192 && <= 207            12          '8'
>= 208 && <= 223            13          '9'
>= 224 && <= 239            14          0x0D
>= 240 && <= 254            15          NULL