import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;
import java.util.NoSuchElementException;
import java.math.BigInteger;

public class Main{

	static PrintWriter out;
	static BufferedReader ir;

	static void solve() throws IOException{
		char[] s=ir.readLine().toCharArray();
		int cnt=0,ma=0;
		for(int i=0;i<s.length;i++){
			if(s[i]=='…') cnt++;
			else{
				ma=Math.max(ma,cnt);
				cnt=0;
			}
		}
		ma=Math.max(cnt,ma);
		out.println(ma);
	}

	public static void main(String[] args) throws Exception{
		ir=new BufferedReader(new InputStreamReader(System.in,"UTF-8"));
		out=new PrintWriter(System.out);
		solve();
		out.flush();
	}
}