#include <iostream>
#include <cstdio>
#include <cstring>
FILE *f,*g;
using namespace std;

int main()
{
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    char c;
    long cuvinte=0,lungime=0,sem;
    sem=0;
    while(!feof(f))
    {
        fscanf(f,"%c",&c);
        if(c>='A'&&c<='z')
        {
            lungime++;
            if(!sem)
            {
                sem=1;
            }
        }
        else
        {
            if(sem)
            {
                cuvinte++;
                sem=0;
            }
        }
    }
    fprintf(g,"%ld",lungime/cuvinte);
    fclose(f);
    fclose(g);
    return 0;
}