using System;

class CWW
{
	static void Main(String[] args)
	{
		String S = Console.ReadLine();
		uint[] wCount = new uint[S.Length+1];
		for(int i=S.Length-1; i >= 0; i--)
		{
			if(S[i] == 'w')
			{
				wCount[i] = wCount[i+1]+1;
			}
			else
			{
				wCount[i] = wCount[i+1];
			}
		}

		ulong cwwCount = 0;
		for(int i=0; i<S.Length-2; i++)
		{
			if(S[i] == 'c')
			{
				if(wCount[i+1] >= 2)
				{
					cwwCount += wCount[i+1] * (wCount[i+1] - 1) / 2;
				}
			}
		}
		Console.WriteLine(cwwCount);
	}
}