import java.util.*;

class Question418
{
	public static void main(String[] str){
		
		Scanner scan = new Scanner(System.in);
		
		String s = scan.next();
		int cnt=0;
		
		s = s.replaceAll("-","");
		s = s.replaceAll("min","1");
		
		for(int i=0;i<s.length();i++){
			if(s.charAt(i)=='1')
				cnt++;
		}
		
		System.out.println(cnt);
	}
}