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

int main()
{
int i;
int iMax;
int iCnt;
char S[ 500 ];
char C;

	cin >> S;

	iMax = 0;
	iCnt = 0;
	i = 0;
	while( ( C = S[ i ] ) != '\0' )
	{
		if( C == 0xE2 )
		{
			if( S[ i + 1 ] == 0x80 && S[ i + 2 ] == 0xA6 )
			{
				i += 2;
				iCnt++;
				if( iMax < iCnt ) iMax = iCnt;
			}
			else
				iCnt = 0;
		}
		else
			iCnt = 0;

		i++;
	}

	cout << iMax << endl;

	return 0;
}