#include<cstdio>
FILE *f,*g;
long nrl,nrc,lm;
char c;
bool ok;
int main()
{
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    nrl=0;
    nrc=0;
    while (1)
    {
        c=fgetc(f);
        if ((c>='A' && c<='Z') || (c>='a' && c<='z'))
        {
            nrl++;
            if (!ok)
            {
                nrc++;
                ok=1;
            }
        }
        else
        {
            ok=0;
            if (c==EOF)
                break;
        }
    }
    lm=nrl/nrc;
    fprintf(g,"%ld",lm);
    fclose(f);
    fclose(g);
    return 0;
}