#include<fstream>

using std::ofstream;
using std::ifstream;

int main()
{
    char ch;
    int nrc=0,nrl=0,incuvant=0;
    
    ifstream fin("text.in");
    ofstream fout("text.out");
    
    while(fin.get(ch))
    {
        if(ch>='a' && ch<='z' || ch>='A' && ch<='Z')
        {
            nrl++;
            incuvant=1;
        }
        else
            if(incuvant)
            {
                incuvant =0;
                nrc++;
            }
    }
    
    fout<<nrl/nrc;
    fin.close();
    fout.close();
    
    return 0;
}