#include<fstream>
#include<stdio.h>
using namespace std;
FILE *f=fopen("text.out","r");
FILE*g=fopen ("text.in","w");
char l1,l2;
int nr,nr1;
int main(){
    fscanf (f,"%c",l1);
    while (fscanf (f,"%c",l2)!=EOF){
    if (l2>='a'&&l2<='z'||l2>='A'&&l2<='z'){
        nr1++;
    }
    else{
        nr++;
    while (!(l1>='a'&&l1<='z'||l2>='A'&&l2<='z')){
        if (fscanf (f,"%c",l1)==EOF)
            break;
        }
        nr1++;
    }
    }
    fprintf(g,"%d",nr1/nr);
    return 0;
    }