void scan $($&X$,$ N$,$ U$,$ L$,$ D$)$ Write a function to scan an array $"$X$"$ of $"$N$"$ bytes counting how many bytes are ASCII codes for:

$($a$)$ upper case letters$-$ U

$($b$)$ lower case letters$-$L

$($c$)$ decimal digits $-$D

Return the counts on the stack. the address of the array and the number of bytes N will be passed to the function on the stack