import java.util.Scanner;

public class Shape {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if (n < 1 || n > 3) {
            System.out.println("Invalid input");
            return;
        }
        double[] dimensions = new double[n];
        for (int i = 0; i < n; i++) {
            dimensions[i] = scanner.nextDouble();
            if (dimensions[i] <= 0) {
                System.out.println("Invalid input");
                return;
            }
        }
        if (n == 1) {
            System.out.println("Circle");
        } else if (n == 2) {
            if (dimensions[0] == dimensions[1]) {
                System.out.println("Square");
            } else {
                System.out.println("Rectangle");
            }
        } else if (n == 3) {
            if (dimensions[0] == dimensions[1] && dimensions[1] == dimensions[2]) {
                System.out.println("Cube");
            } else {
                System.out.println("Triangle");
            }
        }
        
        sc.close();
    }
}