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

int main()
{
int i;
int iCnt;
int iMax;
char C[ 50 ];
char S[ 50 ];

	cin >> C;
	cin >> S;
	strcat( C, S );

	iCnt = 0;
	iMax = 0;
	for( i = 0; i < 14; i++ )
	{
		if( C[ i ] == 'o' )
		{
			iCnt++;
			if( iMax < iCnt ) iMax = iCnt;
		}
		else
			iCnt = 0;
	}

	cout << iMax << endl;

	return 0;
}