#include<fstream>
#include<cstring>
using namespace std;
ifstream  fin("text.in");
ofstream fout("text.out");

int c,l,i,k;//nr de cuvinte/nr de litere
char a[1100000];

int main()
{
    fin.get(a,1100000,'\n');
    c=strlen(a);
    l=0;c=0;k=0;
    for(i=0;i<c;i++)
    {
        if(a[i]>='a'&& a[i]<='z')a[i]=a[i]-32;
        if(a[i]<'A'|| a[i]>'Z'){a[i]=' ';k=0;}
        else
            {
                l++;
                if(k==0){c++; k=1;}
            }
    }
    fout<<l/c;
    fin.close();
    fout.close();
    return 0;
}