Read a $2-$character string from input into variable userString. Declare a Boolean variable noDuplicates and assign noDuplicates

with true if the following conditions are met:

userString does not contain two of the same character.

For alphabetic characters, userString does not contain two of the same letter $($regardless of case$).$

Otherwise, assign noDuplicates with false.

Ex: If the input is $f.,$ then noDuplicates is assigned with true, so the output is:

String is valid

Ex: If the input is $Nn,$ then noDuplicates is assigned with false, so the output is:

String is not valid

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

import java.util.Scanner;

public class StringModification $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($

System.in$)$;

String userString;

$V^{**}$ Your code goes here $*/$

if $($noDuplicates$)\{$

$\}$

System.out.println$("$String is valid"$)$;

else $\{$

$\}$

System.out.println$("$String is not valid"$)$;

$\}$

$\}$