#include <stdio.h>
#include <string.h>
#define MaxDay (14)

void main(void){
	
	int longestDay = 0;
	char week[2][100] = {"a","a"};
	scanf("%s\n%s\n",week[0],week[1]);
	char goldenWeek [100] = "a";
	goldenWeek [100] = strcat(week[0], week[1]);
	int count = 0;
	for(int i = 0 ; i < MaxDay ; i++){
		if(goldenWeek[i] == 'o'){
			count++;
		}else{
			if(longestDay < count){
				longestDay = count;
			}
			count = 0;
		}
	}
	printf("%d\n",longestDay);
}