#include <fstream>
#define In "text.in"
#define Out "text.out"
using namespace std;
inline bool Este_lit(char ch)
{
    return (('a'<=ch && ch<='z' )||('A'<=ch && ch<='Z'));
}
int main()
{
    int c=0,cuv=0;
    char ch,ch1 = 0;
    ifstream f(In);
    while(!f.eof())
    {
        f.get(ch);
        if(Este_lit(ch)==true)
        {
            c++;
            if(Este_lit(ch1)==false)
                cuv++;
        }
        ch1 =ch;
    }
    f.close();
    ofstream g(Out);
    g<<c/cuv<<"\n";
    g.close();
    return 0;
}