Question: A 3 - character string, userString, is read from input. Check if the first and second characters in userString are alphabetic characters. Replace the alphabetic

A 3-character string, userString, is read from input. Check if the first and second characters in userString are alphabetic characters. Replace the alphabetic characters (if any) with '.'. If neither character is alphabetic, userString is not changed. Ex: If the input is ps 8, then the output is:
8
Ex: If the input is k9p, then the output is:
9p
#include
 A 3-character string, userString, is read from input. Check if the

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