#include <stdio.h>

int findCww(char* s){
    int i = 0;
    int count = -1;

    int isFoundC = 0;
    int isFoundW1 = 0;
    int isFoundW2 = 0;

    for(; i < 100; ++i){
        if(!isFoundW1 && !isFoundW2 && s[i] == 'c'){
            //printf("%d :", i);
            //puts("found C");
            isFoundC = 1;
            count = 1;
        } else if(isFoundC && !isFoundW1 && s[i] == 'w'){
            //printf("%d :", i);
            //puts("found W1");
            isFoundW1 = 1;
        } else if(isFoundC && isFoundW1 && s[i] == 'w'){
            //printf("%d :", i);
            //puts("found W2");
            isFoundW2 = 1;
            
            return count;
        }
        if(isFoundC) count++;
    }
    if(!isFoundW2) return -1;
    return -2;
}

int main(){
    char s[] = "chiwaaaaaaamikawayadeeeeesu";
    // scanf("%s", s);
    printf("%d\n", findCww(s));
}