#include <stdio.h>

int main(void){
	int holiday = 0;
	int maxHoliday = 0;
	int i;
	char cf[10], cs[10];
	scanf("%s", cf);
	scanf("%s", cs);
	for(i=0;i<10;i++){
		if(cf[i] == '\0'){break;}
		if(cf[i] == 'o'){
			holiday++;
		}else{
			if(maxHoliday < holiday ){
				maxHoliday = holiday;
			}
			holiday = 0;
		}
	}
	
	for(i=0;i<10;i++){
		if(cs[i] == '\0'){break;}
		if(cs[i] == 'o'){
			holiday++;
		}else{
			if(maxHoliday < holiday ){
				maxHoliday = holiday;
			}
			holiday = 0;
		}
	}
	if(holiday != 0){
		if(maxHoliday < holiday ){
			maxHoliday = holiday;
		}
	}
	printf("%d\n", maxHoliday);
	return 0;
}