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

int main(void) {
	int l,i;
	unsigned long long int c=0,cw=0,r=0;
	char s[131072];
	scanf("%s",s);
	l = strlen(s);
	for(i = 0;i < l;i++){
		if(s[i] == 'c'){c++;}
		if(s[i] == 'w'){r+=cw;cw+=c;}
	}
	printf("%llu\n",r);
	return 0;
}