Java Programs - Solved 2012 ICSE Computer Science Paper

import java.util.Scanner;
class Sequence{
    public static void main(String args[]){
        Scanner in = new Scanner(System.in);
        System.out.print("Enter the string: ");
        String s = in.nextLine().toUpperCase();
        int count = 0;
        for(int i = 0; i < s.length() - 1; i++){
            char a = s.charAt(i);
            char b = s.charAt(i + 1);
            if(a == b)
                count++;
        }
        System.out.println(count);
    }
}