#include <bits/stdc++.h>
using namespace std;

int main(void) {
	unsigned char s[1000];
	scanf("%s", s);
	int i = 0, n = 0, mx = 0;
	while (s[i] != 0) {
		if (s[i] == 226 && s[i + 1] == 128 && s[i + 2] == 166) {
			n++;
			mx = max(n, mx);
			i += 3;
		} else {
			n = 0;
			i++;
		}
	}
	printf("%d\n", mx);
	return 0;
}