===============================================================================
Array list for explode
Array
(
    [0] => DAVE
    [1] => IS
    [2] => THE
    [3] => GREATEST
)
===============================================================================


===============================================================================
Array list for letters
Array
(
    [0] => Array
        (
            [0] => D
            [1] => A
            [2] => V
            [3] => E
        )

    [1] => Array
        (
            [0] => I
            [1] => S
        )

    [2] => Array
        (
            [0] => T
            [1] => H
            [2] => E
        )

    [3] => Array
        (
            [0] => G
            [1] => R
            [2] => E
            [3] => A
            [4] => T
            [5] => E
            [6] => S
            [7] => T
        )

)
===============================================================================

number of words (columns) = 4
number of rows (letters) = 8
D I T G  
A S H R  
V  E E  
E   A  
   T  
   E  
   S  
   T  

===============================================================================
Array list for vertical_text
Array
(
    [0] => DITG 
    [1] => ASHR 
    [2] => V EE 
    [3] => E  A 
    [4] =>    T 
    [5] =>    E 
    [6] =>    S 
    [7] =>    T 
)
===============================================================================

Untitled Document DITG  
ASHR  
V EE  
E  A  
   T  
   E  
   S  
   T