#include <stdio.h>

int main() {
	char s[601];
	int cnt = 0, max = 0, i;

	scanf("%s", s);
	for (i = 0; s[i] != '\0'; i++) {
		if (s[i + 2] == 30 && s[i + 1] == -127 && s[i] == 99) {
			cnt++;
			i += 2;
			if (cnt > max) max = cnt;
		}
		else cnt = 0;
	}

	printf("%d\n", max);
	return 0;
}