import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int nextSunday = 0;
        
        switch(S){
            case "SUN": nextSunday++;
            case "MON": nextSunday++;
            case "TUE": nextSunday++;
            case "WED": nextSunday++;
            case "THU": nextSunday++;
            case "FRI": nextSunday++;
            case "SAT": nextSunday++;
        }
        
        System.out.println(nextSunday);
    }
}
/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