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

namespace
{
char S[ 100100 ];
int A[ 100100 ];
}

int main()
{
int i;
int iLen;
int x;
int y;
char C;
int iCnt;
int iMin;

	cin >> S;

	i = 0;
	iCnt = 0;
	while( ( C = S[ i ] ) != '\0' )
	{
		if( C == 'c' )
		{
			if( S[ i + 1 ] == 'c' && S[ i + 2 ] == 'w' )
			{
				A[ iCnt ] = i;
				iCnt++;

				i += 3;
				continue;
			}
		}
		
		i++;
	}

	iLen = i;
	if( iCnt == 0 )
	{
		cout << 0 << endl;

		return 0;
	}

	x = A[ iCnt - 1 ] + 1;
	y = iLen - A[ 0 ] - 2;
	if( x > y )
		iMin = y;
	else
		iMin = x;

	y = iCnt - 1;
	for( i = 0; i < y; i++ )
	{
		x = ( A[ i ] + 1 ) + ( iLen - A[ i + 1 ] - 2 );
		if(  iMin > x ) iMin = x;
	}

	cout << iMin << endl;

	return 0;
}