Read a $3-$character string from input into variable inputString. Declare a Boolean variable areDigits and assign areDigits with true if the first and third characters of inputString are both digits. Otherwise, assign areDigits with false.

Ex: If the input is $2\%7,$ then areDigits is assigned with true, so the output is:

Valid string

Ex: If the input is $9$zw$,$ then areDigits is assigned with false, so the output is:

Invalid string

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