import java.util.*;
public class Main {
    public static void main(String[] args) {
		String[] list={"SUN","MON","TUE","WED","THU","FRI","SAT"};
      	Scanner sc=new Scanner(System.in);
      	String s=sc.next();
      	int o=0;
      	for(int i=0;i<7;i++){
        	if(list[i].equals(s)){
            	o=7-i;
            }
        }
      	System.out.println(o);
    }
}
/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