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());
            }
        }
    }
 
 

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