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

Ex: If the input is $51$x$,$ then isValid is assigned with true, so the output is:

Valid string

Ex: If the input is $6$#@$,$ then isValid is assigned with false, so the output is:

Invalid string

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