Regex to get middle initial or the only letter

[AhmedKutraphali]

Get the middle initial after a name using regex , the patter would be the last single letter from a string ? . Thanks for any idea.

Example Input :
Scott M

Output:
M

Example Input :
Scott Markcus J
Output : J

[Divyanshu_Divyanshu]

@AhmedKutraphali

Scott Markcus J

Please find the below regex:

\s[A-Z]$

[PRASHANT_GABHANE]

Alternative
Split with " " and fetch the last item in the array.