#include <stdio.h>

int factorial(int x)
{
	if( x == 0 ) return 1;
	return x * factorial(x-1);
}

int combi(int c)
{
	if( c < 2 ) return 0;
	return factorial(c) / ( factorial(c-2) * factorial(2) );
}

int main(void)
{
	int i, j, sum = 0, wc = 0;
	char s[100001];
	scanf("%s", &s);

	for( i = 0; s[i] != NULL; i++) {
		if( s[i] == 'w' ) wc++;
	}

	for( i = 0; s[i] != NULL; i++) {
		if( s[i] == 'c' ) {
			int cc = 0;
			for( j = i+1; s[j] != NULL; j++) {
				if( s[j] == 'w' ) cc++;
			}
			sum += combi(cc);
		}
	}

	printf("%d\n", sum);

	return 0;
}