import java.util.Random;
    class Main {
        private static final Random random = new Random();

        private static final String[] SHAPES = {
            "square", "circle", "cone", "prism", "cube", "cylinder", "triangle",
            "star", "moon", "parallelogram"
        };

        public static String randomShapeWord() {
            return SHAPES[random.nextInt(SHAPES.length)];
        }

        public static void main(String[] args) {
            for (int i = 0; i < 20; i++) {
                System.out.println(randomShapeWord());
            }
        }
    }