#include<stdio.h>

int main(void) {
	int count, num, i;
	char a[1024];
	num = 0;
	count = 0;

	scanf("%s", a);
	for (i = 0; i<1024; i++) {
		if (a[i] == '…')
			count++;
		else {
			if (num < count)
				num = count;
			count = 0;
		}
	}

	printf("%d\n", num);

	return 0;
}