Read a $3-$character string from input into variable userString. Declare a Boolean variable isValid and assign isValid with true if userString does not contain any alphabetic characters. Otherwise, assign isValid with false.

Ex: If the input is # $5,$ then isValid is assigned with true, so the output is:

Good string

Ex: If the input is $3$p$4,$ then isValid is assigned with false, so the output is:

Bad string

Note: Use getline$($cin$,$ userString$)$ to read the entire line from input into userString.

In C$++$ please.