import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();

        switch (s){
            case "SUN":
                System.out.println("7");
                break;
            case "MON":
                System.out.println("6");
                break;
            case "TUE":
                System.out.println("5");
                break;
            case "WED":
                System.out.println("4");
                break;
            case "THU":
                System.out.println("3");
                break;
            case "FRI":
                System.out.println("2");
                break;
            case "SAT":
                System.out.println("1");
                break;
            default:
                System.out.println("?");
                break;
        }
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz