#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int isalpha(char ch)
{
    if((ch>='a' && ch<='z') || (ch>='A' && ch<='Z'))return 1;
    return 0;
}
int main()
{
    char prc,act;
    prc='#';
    int lg=0,nrcuv=0;
    while(fin.get(act))
    {
        if(isalpha(prc)==0 && isalpha(act)==1)
        {
            lg++;
            nrcuv++;
        }
        else if(isalpha(act))lg++;
        prc=act;
    }
    fout<<lg/nrcuv;
    return 0;
}