#include <stdio.h>
#include <string.h>

int main(void)
{
	char c[15], t[8];
	scanf("%s\n%s", c, t);
	strcat(c, t);
	int s, i = 0, a = 0;
	while (c[i] > 0) {
		s = 0;
		while (c[i] == 111) {
			s++;
			if (s > a) a = s;
			i++;
		}
		i++;
	}
	printf("%d\n", a);
	return 0;
}