import java.util.Scanner;
public class FunWithStrings{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter a string: ");
        String txt = scan.nextLine();

        int lcv = 0;   // init lcv
        while(lcv < txt.length()) {   // test lcv
            System.out.print("position: " + lcv);
            System.out.println("   char: " + txt.charAt(lcv));
            lcv++;   // update lcv 
        }
        // Now, print the characters in reverse order.
        int cntAs = 0;
        lcv = txt.length() - 1;
        while (lcv >= 0) {
            char ch = txt.charAt(lcv);
            System.out.print(ch);
            if (ch == 'a' || ch == 'A') {
                cntAs++;
            }
            lcv--;
        }
        System.out.println();
        System.out.println("There were " + cntAs + " as.");


    } //main    
}