#include <iostream>
#include<cstring>
#include<fstream>

using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    char c;
    int word=0,letter=0,ok=1;
while(fin.get(c)){
    
    if((c>='a'&&c<='z')||(c>='A'&&c<='Z')) // verific daca "c" e litera
    {
    letter++;
    if(ok==1)
    word++;
    ok=0;
    }
    else ok=1; 
}
fout<<letter/word;
}