#include <iostream> #include <vector> #include <set> #include <algorithm> #include <math.h> #include <string.h> #include <map> #include <numeric> #include <random> #include <queue> #include <deque> #include <tuple> #include <iomanip> #include <iterator> #include <functional> using namespace std; typedef long long ll; const int INF = (1 << 30) - 1; const ll INFLL= (1LL << 61) - 1; const int MOD = 1000000007; #define ALL(a) (a).begin(),(a).end() #define rALL(a) (a).rbegin(),(a).rend() #define FOR(i,a,b) for(int i=(a);i<(b);++i) #define REP(i,n) FOR(i,0,n) int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); string S; cin>>S; REP(i,S.length()){ cout<<char((S[i]-i-'A'+25+26*100)%26+'A'); } cout<<endl; }