Read a $3-$character string from input into variable userString. Declare a Boolean variable allAlphas and assign allAlphas with true if userString only contains alphabetic characters. Otherwise, assign allAlphas with false.

Ex: If the input is yff$,$ then allAlphas is assigned with true, so the output is:

Good string

Ex: If the input is $6$xx$,$ then allAlphas is assigned with false, so the output is:

Bad string

Note: Use userString $=$ scnr$.$nextLine$()$ to read the entire line from input into userString.