#include <stdio.h>
#include <string.h>

int combi(int c)
{
	if( c < 2 ) return 0;
	return c*(c-1)/2;
}

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

	for( i = 0; a[i] != NULL; i++) {
		if( a[i] == 'w' ) {
			strcat(s, "w");
		} else if ( a[i] == 'c' ) {
			strcat(s, "c");
		}
	}

	for( i = 0; s[i] != NULL; i++) {
		if( s[i] == 'c' ) {
			int wc = 0;
			for( j = i+1; s[j] != NULL; j++) {
				if( s[j] == 'w' ) wc++;
			}
			sum += combi(wc);
		}
	}
	printf("%d\n", sum);

	return 0;
}