#include <fstream>
#include <cstring>
#include<cctype>
using namespace std;
ifstream cin("text.in");
ofstream cout("text.out");
int main()
{
    char c1,c2;
    int k=0, k1=0;
    c1=cin.get();
    if(isalpha(c1))
        k++,k1++;
    while((c2=cin.get())!=-1){
        if(isalpha(c2)){
            k++;
         if(!isalpha(c1))
            k1++;

        }
        c1=c2;

    }
    if(k!=0)
    cout<<k/k1;
   else
    cout<<0;
    return 0;
}