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

int main(void)
{
    char S[100001];
    int length, i;
    long cum[100000], ans = 0;
    scanf("%s", S);
    length = strlen(S);
    if (S[length - 1] == 'w') cum[length - 1] = 1;
    else cum[length - 1] = 0;
    for (i = length - 2; 0 <= i; --i) {
        if (S[i] == 'w') cum[i] = cum[i + 1] + 1;
        else cum[i] = cum[i + 1];
    }
    for (i = 0; i < length; ++i) {
        if (S[i] == 'c') ans += ((cum[i] - 1) * cum[i]) / 2;
    }
    printf("%ld", ans);
    return 0;
}