Question: Read a 3 - character string from input into variable userString. Declare a Boolean variable allAlphas and assign allAlphas with true if userString only contains

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 6xx, 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.

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