#include <stdio.h>
int main(void){
    char S[100001];     //  words 'c' and 'd'
    int countC = 0;     //  numbers of 'c'
    int countW = 0;     //  numbers of 'w'

    scanf("%s",S);

    for(int i = 0; S[i] != 'w'; i++){
        countC++;
    }
    for(int j = countC; S[j] != 0; j++){
        countW++;
    }

    //  check ok
    //  printf("c = %d, w = %d\n",countC,countW);

    countC -= 1;

    if(countC <= countW){
        printf("%d\n",countC);
    }else{
        printf("%d\n",countW);
    }

    return 0;
}