#include <fstream>
#include<string.h>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int main()
{
    char a;
    int ok,nl=0,nc=0,last;
    in.get(a);
    if(isalpha(a)){nl++;last=1;nc++;}
    while(in.get(a))
    {
       if(isalpha(a))
       {
           if(last==1) nl++;
           if(last==0) {nl++;nc++;last=1;}
       }
        if(!isalpha(a)) last=0;

    }
    out<<(int)nl/nc;;
    return 0;
}