import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class Main {
  public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  
    Map<String, Integer> week = new HashMap<>();
    week.put("SUN", 1);
    week.put("MON", 2);
    week.put("TUE", 3);
    week.put("WED", 4);
    week.put("THU", 5);
    week.put("FRI", 6);
    week.put("SAT", 7);
    
    int temp = week.get(br.readLine());
    temp++;
    int result = 1;
    while (temp%7 != 1){
      temp++;
      result++;
    }
    System.out.println(result);
  }
}
/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