using System;

public class Program {
	public static void Main(string[] args) {
		string s = Console.ReadLine() + Console.ReadLine();
		char[] c = s.ToCharArray();
		
		int count = 0;
		int max = 0;
		for (int i = 0; i < c.Length; i++) {
			if (c[i].Equals('o')) {
				count++;
			} else {
				count = 0;
			}
			if (count > max) {
				max = count;
			}
		}
		
		Console.WriteLine(max);
	}
}