import java.util.*;
import java.io.*;
 
public class Main { //クラス名はMain
    public static void main(String[] args) {
        //コード
      	Scanner sc = new Scanner(System.in);
      	String[] week = {"SUN","MON","TUE","WED","THU","FRI","SAT"};
      	
      	String str = sc.next();
      
      	for (int i = 0; i < 7; i++) {
          	if(week[i].equals(str)) {
              	System.out.println(7-i);
              	System.exit(0);
            }
        }
    }
}
/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