#include <stdio.h>

int main(void) {
	int a = 0,m = 0,i;
	char s[8];
	scanf("%s",s);
	for(i = 0;i < 7;i++){
		if(s[i] == 'o'){a++;}
		else{a = 0;}
		if(a > m){m = a;}
	}
	scanf("%s",s);
	for(i = 0;i < 7;i++){
		if(s[i] == 'o'){a++;}
		else{a = 0;}
		if(a > m){m = a;}
	}
	printf("%d\n",m);
	return 0;
}