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

void main(void){
	char week[100] = "a";
	scanf("%s",week);
	char secondWeek[100] = "a";
	scanf("%s",secondWeek);
	strcat(week,secondWeek);
	int maxday = 0;
	int dayCount = 0;
	for(int i = 0 ; i < 14;i++){
		if(week[i] == 'o'){
			dayCount++;
		}else{
			if(maxday < dayCount){
				maxday = dayCount;
			}
			dayCount = 0;
		}
	}
	printf("%d",maxday);
}