import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String day = scanner.next();
        System.out.println(Days(day));
    }
public static int Days(String day){
        String[] days = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
        int counter = 0;
        boolean flag = false;
        for (String s : days) {
            if (day.equals(s)) {
                flag = true;
            }
            if (flag)
                counter++;
        }
        return counter;
    }
}
/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