#include <cstdio>
#include <cctype>
#define filein "text.in"
#define fileout "text.out"
using namespace std;
int nrcuv,nrlit;
char c;
bool cuv=false;
int main()
{
    FILE *f,*g;
    f=fopen(filein,"r");
    g=fopen(fileout,"w");
    while (fscanf(f,"%c",&c)!=EOF)
    {
        if (isalpha(c))
        {
            nrlit++;
            if (!cuv)
            {
                nrcuv++;
                cuv=true;
            }
        }
        else cuv=false;
    }
    fprintf(g,"%d",nrlit/nrcuv);
    fclose(f);
    fclose(g);
    return 0;
}