#include<stdio.h>
#include<string.h>
int main()
{
    FILE *f=fopen("text.in","r"),*g=fopen("text.out","w");
    char a[100000],*p;
    int i=0,n,cuv=0,lit=0,valid=0;
    while(fscanf(f,"%c", &a[i])!=EOF)
     {  if(((a[i]>='a')&&(a[i]<='z'))||((a[i]>='A')&&(a[i]<='Z'))){valid=1;lit++;}
        else{
               if(valid==1)cuv++; 
               valid=0;
               }     
        i++; }
    i--;
    if(((a[i]>='a')&&(a[i]<='z'))||((a[i]>='A')&&(a[i]<='Z')))cuv++;
    fprintf(g,"%d",(lit/cuv));
    return 0;
}