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


int main(void)
{
	char c1[15], c2[15];
	int total = 0;
	int max = 0;
	int i;

	scanf("%s", c1);
	scanf("%s", c2);

	strcat(c1, c2);

	for (i = 0; i < strlen(c1) + 1; i++) {
		if (c1[i] == 'o') {
			total++;
			} else {
				if (max < total) {
					max = total;
				}
				total = 0;
			}
	}
	printf("%d\n", max);

	return 0;
}