#include <stdio.h>
#include <malloc.h>

char str[60000];
int str_len = 0;

/// <summary>
/// グローバル変数strの中身を入力された文字列で上書きする
/// </summary>
void ReadString() {
	char c = getchar();
	str_len = 0;

	while (c != '\n') {
		str[str_len] = c;
		c = getchar();
		str_len++;
	}
}

int main()
{
	int max = 0;
	int now = 0;
	char days[14];
	ReadString();
	for (int i = 0; i < 7; i++) days[i] = str[i];
	ReadString();
	for (int i = 0; i < 7; i++) days[i + 7] = str[i];
	for (int i = 0;i < 14;i++) {
		if (days[i] == 'o') now++;
		if (now > max) max = now;
		if (days[i] == 'x') now=0;
	}
	printf("%d\n",max);
}