#include <iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <istream>
using namespace std;

char a[100];
ifstream in("text.in");
ofstream out("text.out");

void afisare()
{
    int nr=0,ma,s=0;
    for(int i=0;i<strlen(a)-1;i++)
    {
        if((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z'))
        nr++;
        if(((a[i]>='a'&&a[i]<='z')||(a[i]>='A'&&a[i]<='Z'))&&((a[i+1]<'a'||a[i+1]>'z')&&(a[i+1]<'A'||a[i+1]>'Z')))
        s++;
    }
    ma=nr/s;
    out<<ma;

}

void citire()
{
    in.getline(a,100);
}

int main()
{
    citire();
    afisare();
  return 0;
}