#include <stdio.h>

using namespace std;
FILE *f,*g;


int main()
{
    char ch;
    int ok=0;
    long long nr=0,cuv=0,sol;
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    ch=fgetc(f);
    while(!feof(f))
    {

        if((ch>='a'&&ch<='z')||(ch>='A'&&ch<='Z'))
            nr++,ok=1;
        else
        {
            if(ok==1)
               cuv++;
            ok=0;

        }
         ch=fgetc(f);
    }
    if(cuv!=0)
        sol=nr/cuv;
    else
        sol=0;
    fprintf(g,"%lld",sol);
    fclose(f);
    fclose(g);
    return 0;
}