#include <stdio.h>

unsigned char s[700];

int main(void) {
	scanf("%s", s);
	
	int i = 0, n = 0, max = 0;
	
	while(s[i] != 0) {
		if(s[i] == 226 && s[i + 1] == 128 && s[i + 2] == 166) {
			n++;
			max = (max < n ? n : max);
			i += 3;
		} else {
			n = 0;
			i++;
		}
	}
	
	printf("%d\n", max);
	
	return 0;
}