Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

var scanner = bufio.NewScanner(os.Stdin)

func nextString() string {
	scanner.Scan()
	return scanner.Text()
}

func incrementByte(b byte) byte {
	if b >= 97 && b < 122 {
		return b + 1
	} else if b == 122 {
		return 97
	}
	return b
}

func main() {
	scanner.Split(bufio.ScanLines)

	for {
		line := nextString()
		if len(line) == 0 {
			break
		}
		for i := 0; i <= 26; i++ {
			decoded := []byte{}
			for j := 0; j < len(line); j++ {
				decoded = append(decoded, incrementByte(line[j]))
			}
			line = string(decoded)
			if strings.Contains(line, "the") || strings.Contains(line, "this") || strings.Contains(line, "that") {
				fmt.Println(line)
				break
			}
		}
	}
}

C++: #define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#include "bits/stdc++.h"
#define REP(i,a,b) for(int i=a;i<b;++i)
#define rep(i,n) REP(i,0,n)
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
#define ALL(a) begin(a),end(a)
#define ifnot(a) if(not (a))
#define dump(x)  cerr << #x << " = " << (x) << endl
using namespace std;

// #define int ll
#ifdef _MSC_VER
const bool test = true;
#else 
const bool test = false;
#endif

int dx[] = { 0,1,0,-1 };
int dy[] = { 1,0,-1,0 };
#define INF (1 << 28)
ull mod = (int)1e9 + 7;
//.....................
const int MAX = (int)2e5 + 5;

string s;

string solve() {
	rep(i, 30) {
		for (auto& c : s) {
			if (isalpha(c)) {
				c++;
				if (c > 'z') c = 'a';
			}
		}
		stringstream ss(s);
		// dump(ss.str());
		string s2;
		while (ss >> s2) {
			if (s2 == "the" || s2 == "this" || s2 == "that") {
				return s;
			}
		}
	}
	return ""s;
}

int main() {
	int N;
	while (getline(cin,s)) {
		cout << solve() << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <string>

int search_number(const std::string &s)
{
    const char *key = "this";
    std::string::size_type p = 0;
    while (true) {
        std::string::size_type sp = s.find(' ', p);
        if (sp - p == 4) {
            int n = s[p] - key[0];
            if (s[p + 1] - key[1] == n && s[p + 2] - key[2] == n && s[p + 3] - key[3] == n) return n;
            else p = sp + 1;
        }
    }
}

int main()
{
    std::string s;
    while (getline(std::cin, s)) {
        std::cout << s << std::endl;
        int n = search_number(s);
        for (unsigned i = 0; i < s.size(); ++i) {
            if (s[i] != ' ' && s[i] != ',' && s[i] != '.') {
                s[i] -= n;
                if (s[i] < 'a') s[i] += 26;
                if (s[i] > 'z') s[i] %= 26;
            }
        }
        std::cout << s << std::endl;
    }
}

C++: #include <iostream>
#include <sstream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <cstdio>
#include <cmath>
using namespace std;

typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
#define ALL(a)  (a).begin(),(a).end()
#define REP(i,n) for(int i=0;i<(n);++i)
const double EPS = 1e-10;
const double PI  = acos(-1.0);
#define dump(x) cerr << "  (L" << __LINE__ << ") " << #x << " = " << (x) << endl;
#define dumpv(x) cerr << "  (L" << __LINE__ << ") " << #x << " = "; REP(q,(x).size()) cerr << (x)[q] << " "; cerr << endl;
template<typename T1, typename T2>
ostream& operator<<(ostream& s, const pair<T1, T2>& d) {return s << "(" << d.first << "," << d.second << ")";}


int main() {
  string s;
  getline(cin, s);

  string orig;
  for (int i = 1; i <= 'z'-'a'; i++) {
    orig = s;
    for (int j = 0; j < orig.size(); j++) {
      if (orig[j] >= 'a' && orig[j] <= 'z') {
        orig[j] = 'a' + ((orig[j]-'a') + i) % ('z'-'a'+1);
      }
    }
    if (orig.find("the") != string::npos ||
        orig.find("this") != string::npos ||
        orig.find("that") != string::npos) {
      break;
    }
  }
  cout << orig << endl;
}

C++: #include <bits/stdc++.h>
using namespace std ;

#define pb(n) push_back(n)
#define fi first
#define se second
#define np string::npos
#define X real()
#define Y imag()
#define value(x,y,w,h) (x >= 0 && x < w && y >= 0 && y < h)
#define all(r) (r).begin(),(r).end()
#define gsort(st,en) sort((st),(en),greater<int>())
#define vmax(ary) *max_element(all(ary))
#define vmin(ary) *min_element(all(ary))
#define debug(x) cout<<#x<<": "<<x<<endl
#define fcout(n) cout<<fixed<<setprecision((n))
#define scout(n) cout<<setw(n)

#define rep(i,n) for(int i = 0; i < (int)(n);++i)
#define repc(i,a,b) for(int i = (a);i < (int)(b);++i)
#define repi(it,array) for(auto it = array.begin(),end = array.end(); it != end;++it)
#define repa(n,array) for(auto &n :(array))

typedef long long ll ;
typedef deque<int> di ;
typedef deque<ll> dl ;
typedef map<string,int> dict;
typedef complex<double> comd;
typedef pair<int,int> pii;

constexpr int imax = ((1<<30)-1)*2+1 ;
constexpr int inf = 100000000;
constexpr double PI = acos(-1.0) ;
double eps = 1e-10 ;
const int dy[] = {-1,0,1,0};
const int dx[] = {0,-1,0,1};

double CalcDist(comd p1, comd p2){
  return sqrt(pow(p1.X - p2.X,2.0) + pow(p1.Y -p2.Y,2.0));
}

  template <typename T>
void out(deque < T > d)
{
  for(size_t i = 0; i < d.size(); i++)
  {
    debug(d[i]);
  }
}

template<typename T>
T ston(string& str, T n){
  istringstream sin(str) ;
  T num ;
  sin >> num ;
  return num ;
}

string Decode(string s, int n){
  string res = s;
  rep(i,s.size()){
    if(s[i] != '.' && s[i] != ' '){
      if(s[i] + n > 'z'){
        res[i] = 'a' + (s[i] + n - 'z')-1;
      }
      else{
        res[i] = s[i] + n;
      }
    }
  }
  return res;
}

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  string s;
  int code;
  vector<string> vs;
  while(1){
    code = 0;
    getline(cin,s);
    if(cin.eof()) break;
    rep(i,27){
      if(Decode(s,i).find("this") != string::npos ||Decode(s,i).find("that") != string::npos||Decode(s,i).find("the") != string::npos){
        code = i;
        break;
      }
    }
    cout << Decode(s,code) << endl;
  }
  return 0;
}