Read a 2-character string from input into variable userString. Declare a Boolean variable isValid and assign isValid 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 isValid with false.   Ex: If the input is 2-, then isValid is assigned with true, so the output is: String accepted Ex: If the input is Tt, then isValid is assigned with false, so the output is: String not accepted Note: Use getline(cin, userString) to read the entire line from input into userString. #include #include #include using namespace std; int main() {    string userString;    /* Your code goes here */        if (isValid) {       cout << "String accepted" << endl;    }    else {       cout << "String not accepted" << endl;    }    return 0; }

Read a 2-character string from input into variable userString. Declare a Boolean variable isValid and assign isValid 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 isValid with false.

Ex: If the input is 2-, then isValid is assigned with true, so the output is:

String accepted

Ex: If the input is Tt, then isValid is assigned with false, so the output is:

String not accepted

Note: Use getline(cin, userString) to read the entire line from input into userString.

#include <iostream>
#include <string>
#include <cctype>
using namespace std;

int main() {
   string userString;

   /* Your code goes here */
   
   if (isValid) {
      cout << "String accepted" << endl;
   }
   else {
      cout << "String not accepted" << endl;
   }

   return 0;
}