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

int main()
{
	wstring S;
	wcin >> S;

	int N = S.size();
	int ans = 0;
	int len = 0;
	for( int i = 0; i < N; i += 2 ) {
		if( S[i] == 0x81 && S[i + 1] == 0x63 ) len++;
		else len = 0;
		ans = max( ans, len );
	}

	cout << ans << endl;
}