#include <fstream>
#include <cstring>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
const int N = 1100000;
char v[N];

inline bool litera(char c)
{
    return ('a'<=c && c<='z') || ('A'<=c && c<='Z');
}

int main ()
{
    int x,i, nrcuv=0, nrcar=0;
    in.getline(v,N);
    for(i=0; v[i]; i++)
    {
        if(!litera(v[i])) continue;
        nrcar++;
        if(i==0 || !litera(v[i-1])) nrcuv++;
    }
    out<<nrcar/nrcuv;
    return 0;
}