#include <bits/stdc++.h>

#define REP(i, n) for(int i = 0; i < (int)(n); ++i)
#define FOR(i, m, n) for(int i = (m); i < (int)(n); ++i)
#define ALL(x) (x).begin(), (x).end()
#define INF 2000000000

#ifdef LOCAL
  #define eprintf(...) fprintf(stdout, __VA_ARGS__)
#else
  #define eprintf(...) 0
#endif

using namespace std;

typedef long long LL;
typedef unsigned long long ULL;
typedef unsigned int uint;

int dec(int c, int diff) {
  c += diff;
  while(c < 'A') {
    c += 'Z' - 'A' +1;
  }
  return c;
}

int main() {
  string s;
  cin >> s;
  REP(i, s.size()) {
    cout << (char)dec(s[i], -(i+1));
  }
  cout << endl;

  return 0;
}