import java.util.*;
public class gw{
	public static void main(String... args){
		Scanner scan = new Scanner(System.in);
		String str1 = scan.next();
		String str2 = scan.next();
		System.out.println(calc(str1+str2));
	}
	public static int calc(String str){
		int[] counter = new int[14];
		for(int i = 0; i < counter.length;i++){
			counter[i] = 0;
		}
		int count = 0;
		int space = 0;
		for(int i = 0; i < str.length(); i++){
			if(str.substring(i,i+1).equals("o")){
				count++;
			}else{
				counter[space] = count;
				count=0;
				space++;
			}
		}
		int max = counter[0];
		for(int i = 1; i < space; i++){
			if(max < counter[i]){
				max = counter[i];
			}
		}

		return max;
	}
}