#include    <iostream>
#include    <fstream>

typedef long long LL;

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

char c;
LL cuv, nr, l;

bool check(char n)
{return ((c>='a' && c<='z') || (c>='A' && c<='Z'));}

int main()
{
    while(fin.get(c))
    {
        if(check(c))
        {
            if(l==0)
                cuv++;
            nr++;
            l=1;
        }
        else{l=0;}
    }
    fout<<nr/cuv;
    return 0;
}