Go: package main

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

var scanner = bufio.NewScanner(os.Stdin)

func main() {
	for scanner.Scan() {
		var result string
		line := scanner.Text()
		key := make(map[string]string)

		var i int32
		for ; i < 52; i++ {
			makeKey(key, i)
			result = decode(key, line)

			if strings.Contains(result, "the") {
				break
			} else if strings.Contains(result, "this") {
				break
			} else if strings.Contains(result, "that") {
				break
			}
		}

		fmt.Println(result)
	}
}

func makeKey(key map[string]string, shift int32) {
	for i := 'a'; i <= 'z'; i++ {
		cipher := (i + shift)
		if cipher > 'z' {
			cipher = cipher%'z' + 'a' - 1
		} else if cipher < 'a' {
			cipher = cipher + ('z' - 'a') + 1
		}
		key[string(i)] = string(cipher)
	}
}

func decode(key map[string]string, cipher string) string {
	var result string
	for _, v := range cipher {
		if key[string(v)] != "" {
			result += key[string(v)]
		} else {
			result += string(v)
		}
	}
	return result
}

C++: #include <iostream>
#include <string>
using namespace std;
string rot(string s, int n){
	for(int i = 0; s[i] != '\0'; i++){
		if(s[i] >= 65 && s[i] <= 90) s[i] = (s[i] - 65 + n) % 26 + 65;
		else if(s[i] >= 97 && s[i] <= 122) s[i] = (s[i] - 97 + n) % 26 + 97;
	}
	return s;
}
// the this that
string text[3] = {"the", "this", "that"};
int main(){
	string line;
	while(getline(cin, line)){
		for(int i = 0; i < 26; i++){
			line = rot(line, 1);
			if(line.find(text[0], 0) != string::npos || line.find(text[1], 0) != string::npos || line.find(text[2], 0) != string::npos){
				cout << line << endl;
				break;
			}
		}
	}
	return 0;
}

C++: #include<iostream>
#include<string>
using namespace std;
main(){
	string str;
	int tmp,b;
	while(getline(cin,str)){
		tmp='t'-str[0];
		for(int i=0;i<str.size();++i){
			if(str[i]>='a' && str[i]<='z'){
				if(str[i]>='r')str[i]-=26;
				str[i]+=tmp;
				if(str[i]<'a')str[i]+=26;
				else if(str[i]>'z')str[i]-=26;
			}
		}
		string str2="    ";
		for(int i=0;i<=3,i<=3;++i)str2[i]=str[i];
		//if(str2=="this" || str2=="the " || str2=="that")
		cout<<str<<endl;
	}
}

C++: #include <bits/stdc++.h>

using namespace std;

void f(string &s)
{
    for (char &c : s) {
        if ('a' <= c && c <= 'z') c = (c + 25) % 26 + 'a';
    }
}

int main()
{
    string s;

    while (getline(cin, s)) {
        if (s.empty()) break;
        while (s.find("the") == string::npos && s.find("this") == string::npos && s.find("that") == string::npos) f(s);
        cout << s << endl;
    }
}

C++: #include<iostream>
#include<string>
#include<algorithm>
using namespace std;

int main(){

  string s;
  int k = 0;

  getline(cin,s);

    for(int i=-25;i<26;i++){
      if(s[0]+i == 't' && s[1]+i == 'h'){
	if(s[2]+i == 'e') k = i;
	if(s[2]+i == 'i' && s[3]+i == 's') k = i;
	if(s[2]+i == 'a' && s[3]+i == 't') k = i;
      }
    }

    for(int i=0;i<s.size();i++){
      if(s[i] <= 'z' && s[i] >= 'a') cout << (char)(s[i]+k);
      else cout << s[i];
    }

    cout << endl;

}

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

using namespace std;

void solve()
{
	string s;
	while(getline(cin, s))
	{
		for(int i = 0; i < 26; ++i)
		{
			for(int j = 0; j < s.size(); ++j)
			{
				if(s[j] >= 'a' && s[j] <= 'z')
				{
					if(s[j] == 'z')
					{
						s[j] = 'a';
					}
					else
					{
						++s[j];
					}
				}
			}
			unsigned int pos1 = s.find("this");
			unsigned int pos2 = s.find("the");
			unsigned int pos3 = s.find("that");
			if(pos1 != string::npos || pos2 != string::npos || pos3 != string::npos)
			{
				cout << s << endl;
				break;
			}
		}
	}
}

int main()
{
	solve();
	return(0);
}

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

using namespace std;

string decipher (const string& s_, int n) {
    string s = s_;
    for (int i = 0; i < s.size(); i++) {
        if ('a' <= s[i] && s[i] <= 'z') {
            int c = (int)s[i] + n;
            if (c > (int)'z') {
                c = c - (int)'z' + (int)'a' - 1;
            }
            s[i] = (char)c;
        }
    }
    return s;
}

bool test (const string& s) {
    if ((int)s.find("the")  != -1) return true;
    if ((int)s.find("this") != -1) return true;
    if ((int)s.find("that") != -1) return true;
    return false;
}

int main (void) {
    while (1) {
        string s, s_;
        getline(cin, s);
        if (cin.eof()) break;
        for (int i = 0; i < 26; i++) {
            s_ = decipher(s, i);
            if (test(s_)) {
                cout << s_ << endl;
                break;
            }
        }
    }
    return 0;
}

C++: //include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned long long ULL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

int main() {
  int n;
  string str;
  
  getline(cin, str);

  for(int i = 0; i < str.size(); i++) {
    for(int j = 0; str[i]+j <= 'z'; j++) {
      if(str[i] + j == 't' && str[i+1] + j == 'h') {
	n = j;
	break;
      }
    } 
    for(int j = 0; str[i]-j >= 'a'; j++) {
      if(str[i] - j == 't' && str[i+1] - j == 'h') {
	n = -j;
	break;
      }
    }
  }
  
  for(int i = 0; i < str.size(); i++) {
    if(str[i] == ' ' || str[i] == '.' || str[i] == '\n') printf("%c", str[i]);
    else printf("%c", str[i]+n);
  }
  cout << endl;
}