#include <stdio.h>
enum stare {OUT, IN};

void iofile(void)
{
        freopen("text.in","r",stdin);
        freopen("text.out","w",stdout);
}

void prel(void)
{
        long lung,nrc;
        stare x=OUT;
        int c;
        lung=nrc=0;
        while ((c=getchar())!=EOF)
        {
                if (((c>='a')&&(c<='z'))||((c>='A')&&(c<='Z')))
                        {
                                lung++;
                                if (x==OUT)
                                        {
                                                nrc++;
                                                x=IN;
                                        }
                        } else
                        {
                                x=OUT;
                       }
        }
        printf("%ld\n",lung/nrc);
        fclose(stdin);
        fclose(stdout);
}


int main(void)
{
        iofile();
        prel();
}