import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // g f d 6 i k i o q
        char letter = 'a';
        while (letter != 'q') {
            letter = input.next().charAt(0);
        }
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        // g f d 6 i k i o q
        int c = 0;
        char letter = 'a';
        while (letter != 'q') {
            letter = input.next().charAt(0);
            ++c;
        }
        System.out.println("Count=" + c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        char letter = 'a';
        int c = 0;
        boolean flag = true;
        while (flag) {
            letter = input.next().charAt(0);
            c++;
            if (letter == 'q') {
                flag = false;
            }
        }
        System.out.println("Count:" + c);
    }
}
import java.util.Scanner;
public class Mohamed {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        float sum = 0;
        float grade = 0;
        int count = 0;
        while (grade != -1) {
            System.out.println("Enter grade #" + (count + 1) + ": ");
            grade = input.nextFloat();
            if (grade != -1) {
                sum += grade;
                count++;
            }
        }
        System.out.println("Avg==" + sum / count);
    }
}