#include<iostream>
#include<cstring>
using namespace std;
int main(){
  char a[81];
  cin.getline(a,81);
  while(1){
    for(int i=0;i<strlen(a);i++){
      if(a[i]==' '||a[i]=='.') continue;
      else if(a[i]=='z') a[i] = 'a';
      else a[i] = a[i]-'a'+'b';
    }
    for(int i=0;i<strlen(a)-3;i++){
      if(a[i]=='t'&&a[i+1]=='h'&&a[i+2]=='i'&&a[i+3]=='s') goto END;
      if(a[i]=='t'&&a[i+1]=='h'&&a[i+2]=='a'&&a[i+3]=='t') goto END;
      if(a[i]=='t'&&a[i+1]=='h'&&a[i+2]=='e') goto END;
    }
  }
 END:
  for(int i=0;i<strlen(a);i++) cout << a[i];
  cout << endl;
  return 0;
}