import java.util.Scanner;

class Main{
  public static void main(String[] arg){
    Scanner scan=new Scanner(System.in);
    String[] week={"SUN","MON","TUE","WED","THU","FRI","SAT"};
    String in=scan.next();
    int day=0, Ans=0;
    for(int a=0; a<7; a++){
      if(in.equals(week[a])){
        day=a;
      }
    }
    Ans=7-day;
    System.out.println(Ans);
  }
}
/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