import java.util.*;
import java.util.Map.Entry;
import java.math.*;
import java.awt.geom.*;
import java.io.*;
      
      
public class Main {	

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String in = sc.next() + sc.next() + "x";
		
		char[] str = in.toCharArray();
		int MAX = 0;
		for(int i = 0; i < str.length; i++) {
			for(int j = 0; j < str.length; j++) {
				if(str[i + j] != 'o') {
					MAX = Math.max(MAX, j);
					break;
				}
			}
		}
		System.out.println(MAX);
	}
}