#include<iostream>
#include<stdio.h>
#include<algorithm>
using namespace std;

int main(void)
{
	unsigned char s[700];

	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++;                //…のutfの中
			mx = max(n, mx);
			i += 3;
		}//3byte使う前提で
		else {
			n = 0;
			i++;
		}
	}

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

	return 0;
}