#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

ifstream f("text.in");
ofstream g("text.out");

char v[260];
int l,nrcuv;

int main()
{
    f.getline(v,260);
    int lsir=strlen(v);
    for (int i=1; i<lsir; i++)
        if ((v[i]>='A' && v[i]<='Z')||(v[i]>='a' && v[i]<='z'))
        {
            l++;
            if (!((v[i-1]>='A' && v[i-1]<='Z')||(v[i-1]>='a' && v[i-1]<='z')))
                nrcuv++;
        }
    if ((v[0]>='A' && v[0]<='Z')||(v[0]>='a' && v[0]<='z'))
        l++,nrcuv++;
    g<<l/nrcuv;
        return 0;
}