#include <iostream>
#include <fstream>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int main()
{
    int cuv=0;
    int lit=0;
    int i=0;
    int flag;
    char v[1000000];
    in.get(v,1000000);
    if((v[i]>='a'&&v[i]<='z')||(v[i]>='A'&&v[i]<='Z'))
    {
        lit++;
    }
    for(i=1;v[i]!='\0';i++)
    {
        if((v[i]>='a'&&v[i]<='z')||(v[i]>='A'&&v[i]<='Z'))
        {
            lit++;
            flag=0;
        }
        else if((v[i-1]>='a'&&v[i-1]<='z')||(v[i-1]>='A'&&v[i-1]<='Z'))
        {
            cuv++;
            flag=1;
        }
    }
    if(flag==0)
        cuv++;
    out<<lit/cuv;
}