#include <bits/stdc++.h>

#define REP(i, x, n) for(int i = x; i < (int)(n); i++)
#define rep(i, n) REP(i, 0, n)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define F first
#define S second
#define mp make_pair

using namespace std;

int main() {
  string s;
  cin >> s;

  rep (i, s.size()) {
    s[i] ^= 32;
  }
  cout << s << endl;
  return 0;
}