realgavle.java

public static void countupA(int n) {
    if (n == 0) {
        System.out.println("blast off");
    } else {
        countupB(n - 1);
        System.out.println(n);
    }
}

public static void countupB(int n) {
    if (n == 0) {
        System.out.println("blast off");
    } else {
        countupC(n - 1);
        System.out.println(n);
    }
}

public static void countupC(int n) {
    if (n == 0) {
        System.out.println("blast off");
    } else {
        countupD(n - 1);
        System.out.println(n);
    }
}

public static void countupD(int n) {
    if (n == 0) {
        System.out.println("blast off");
    } else {
        countupE(n - 1);
        System.out.println(n);
    }
}

public static void countupE(int n) {
    if (n == 0) {
        System.out.println("blast off");
    } else {
        System.out.println("NOT IMPLEMENTED");
    }
}