CODE

#include <iostream>

using namespace std;
string s;

int main(void) {
  getline(cin, s);
  for (int i = 0; i < s.length(); ++i)
    if (s[i] >= 65 && s[i] <= 90) s[i] = (s[i] - 'A' + 1) % 26 + 'A';
    else if (s[i] >= 97 && s[i] <= 122) s[i] = (s[i] - 'a' + 1) % 26 + 'a';

  cout << s << endl;
  return 0;
}