#include<stdio.h>
#include<cstring>
using namespace std;
char s[1000001];
int main(){
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    int n,l=0,nr=0,pp=0,i;
    gets(s);
    n=strlen(s);
    for(i=0;i<n;i++)
        if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z')){
            l++;
            if(pp==0){
                nr++;
                pp=1;
            }
        }
        else
            pp=0;
    printf("%d",l/nr);
    return 0;
}