public static void main(String[] args) {

        for(int i = 1; i <= 7; i++) {

            String n = "-";

            System.out.println(i + multiplyString(n, i));
        }
    }


    private static String multiplyString(String s, int amount) {
        StringBuilder builder = new StringBuilder();
        for(int i = 0; i < amount; i++) {
            builder.append(s);

        }
        return builder.toString();
    }