#include<cstdio>
char s;
int lg;
int nrC;
char c, prec=' ';
void RSData(){
    freopen("text.in","r",stdin);
    while(scanf("%c",&c)>0){
        if(('a'<=c && c<='z') || ('A'<=c && c<='Z')){
            ++lg;
            if(('a'<=prec && prec<='z') || ('A'<=prec && prec<='Z'));
            else nrC++;
        }
        prec = c;
    }
}    

void WriteData(){
    freopen("text.out","w",stdout);
    printf("%d\n", lg/nrC); 
}
 
int main(){
    RSData();
    WriteData();
    return 0;
}