#include <bits/stdc++.h>
using namespace std;
const int MAX = 1e6 + 9;
set<int> ist;
map<string, int> msi;
map<string, string> mss;
map<int, string> mis;
map<int, int> mii;
pair<int, int> pii;
vector<int> v;
vector<pair<int, int> > vv;
int cc[] = {1, -1, 0, 0};
int rr[] = {0, 0, 1, -1};
void BACKSLASH() {
  int t;
  int n;
  string sp;
  cin >> n;
  int res = 0;
  while (cin >> sp) {
    int cnt = 0;
    for (auto c : sp) {
      cnt = (cnt) + ('A' <= c && c <= 'Z');
    }
    res = max(res, cnt);
  }
  cout << res << endl;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  BACKSLASH();
  return 0;
}
