#include <stdio.h>


int min(int a, int b) {
    return a < b ? a : b;
}
char s[100];
int c, w;
int main() {
    gets(s);
    for (int i = 0; s[i]; i++) {
        if (s[i] == 'c')
            c++;
        else
            w++;
    }
    printf("%d\n", min(c-1, w));



    return 0;
}