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문제

가이우스 율리우스 카이사르(Gaius Julius Caesar)는 고대 로마 군인이자 정치가였다. 카이사르는 비밀스럽게 편지를 쓸 때, 'A'를 'D로', 'B'를 'E'로, 'C'를 'F'로... 이런 식으로 알파벳 문자를 3개씩 건너뛰어 적었다고 한다.

26개의 대문자 알파벳으로 이루어진 단어를 카이사르 암호 형식으로 3문자를 옮겨 겹치지 않게 나열하여 얻은 카이사르 단어가 있다. 이 카이사르 단어를 원래 단어로 돌려놓는 프로그램을 작성하시오.

각 문자별로 변환 전과 변환 후를 나타낸 건 아래와 같다.

변환전    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 
변환후    D E F G H I J K L M N O P Q R S T U V W X Y Z A B C

예를 들어서, 이 방법대로 단어 'JOI'를 카이사르 단어 형식으로 변환한다면 'MRL'을 얻을 수 있고, 앞의 예와 같은 방법으로 얻은 카이사르 단어 'FURDWLD'를 원래 단어로 고치면 'CROATIA'가 된다.

입력

입력은 한 줄로 이루어져 있으며, 그 한 줄에는 대문자 알파벳으로 구성된 단어가 1개 있다. 단어는 최대 1000자 이하이다.

출력

입력받은 카이사르 단어를 원래 단어로 고친 걸 출력하시면 된다.

예제 입력 1

MRL

예제 출력 1

JOI

예제 입력 2

FURDWLD

예제 출력 2

CROATIA
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According to literature, if he had anything confidential to say, he wrote in cipher so that the cipher alphabet is the plain alphabet rotated right by three, for instance, &lsquo;A&rsquo; is shifted to &lsquo;D&rsquo;, &lsquo;B&rsquo; is shifted to &lsquo;E&rsquo;, &lsquo;C&rsquo; is shifted to &lsquo;F&rsquo;, and so on.<\/p>\r\n\r\n<p>Write a program which, given a ciphertext obtained by rotating right by three from a plaintext consisting of 26 capital letters in the alphabet as Caesar did, outputs the plaintext.<\/p>\r\n\r\n<p>The following is the pair of plaintext and ciphertext alphabets:<\/p>\r\n\r\n<pre>\r\nPlaintext:   A B C D E F G H I J K L M N O P Q R S T U V W X Y Z\r\nCiphertext:  D E F G H I J K L M N O P Q R S T U V W X Y Z A B C<\/pre>\r\n\r\n<p>For example, using this cipher, the message <code>JOI<\/code> would be encrypted as <code>MRL<\/code> and the plaintext of <code>FURDWLD<\/code> is <code>CROATIA<\/code>.<\/p>\r\n","input":"<p>The input file contains one line and the line includes one string, a ciphertext, consisting of the capital letters in the alphabet. Note that the length of the input string does not exceed 1000.<\/p>\r\n","output":"<p>You should submit the output file which consists of one line, and the line should contain the string which is the plaintext of the input string.<\/p>\r\n","hint":"","original":"0","html_title":"0","problem_lang_tcode":"English"},{"problem_id":"5598","problem_lang":"2","title":"\u30b7\u30fc\u30b6\u30fc\u6697\u53f7","description":"<p>\u30ac\u30a4\u30a6\u30b9\u30fb\u30e6\u30ea\u30a6\u30b9\u30fb\u30ab\u30a8\u30b5\u30eb\uff08Gaius Julius Caesar)\uff0c \u82f1\u8a9e\u8aad\u307f\u3067\u30b8\u30e5\u30ea\u30a2\u30b9\u30fb\u30b7\u30fc\u30b6\u30fc\uff08Julius Caesar\uff09\u306f\uff0c \u53e4\u4ee3\u30ed\u30fc\u30de\u306e\u8ecd\u4eba\u3067\u3042\u308a\u653f\u6cbb\u5bb6\u3067\u3042\u308b\uff0e \u30ab\u30a8\u30b5\u30eb\u306f\uff0c \u79d8\u5bc6\u306e\u624b\u7d19\u3092\u66f8\u304f\u3068\u304d\u306b\uff0c &#39;A&#39; \u3092 &#39;D&#39; \u306b\uff0c &#39;B&#39; \u3092 &#39;E&#39; \u306b\uff0c &#39;C&#39; \u3092 &#39;F&#39; \u306b\uff0c \u3068\u3044\u3046\u3088\u3046\u306b3\u3064\u305a\u3089\u3057\u3066\u8868\u8a18\u3057\u305f\u3068\u3044\u3046\u8a18\u9332\u304c\u6b8b\u3063\u3066\u3044\u308b\uff0e<\/p>\r\n\r\n<p>\u5927\u6587\u5b57\u306e\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c826\u6587\u5b57\u3060\u3051\u304b\u3089\u306a\u308b\u6587\u5b57\u5217\u3092\uff0c \u30ab\u30a8\u30b5\u30eb\u304c\u3057\u305f\u3088\u3046\u306b3\u6587\u5b57\u305a\u3064\u305a\u3089\u3059\u5909\u63db\u3092\u65bd\u3057\u5f97\u3089\u308c\u305f\u6587\u5b57\u5217\u304c\u3042\u308b\uff0e \u3053\u306e\u3088\u3046\u306a\u6587\u5b57\u5217\u3092\u5143\u306e\u6587\u5b57\u5217\u306b\u623b\u3059\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u4f5c\u6210\u305b\u3088\uff0e<\/p>\r\n\r\n<p>\u5404\u6587\u5b57\u306e\u5909\u63db\u524d\u3068\u5909\u63db\u5f8c\u306e\u5bfe\u5fdc\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308b\uff0e<\/p>\r\n\r\n<pre>\r\n\u5909\u63db\u524d    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z \r\n\u5909\u63db\u5f8c    D E F G H I J K L M N O P Q R S T U V W X Y Z A B C<\/pre>\r\n\r\n<p>\u4f8b\u3048\u3070\uff0c \u3053\u306e\u65b9\u6cd5\u3067\u6587\u5b57\u5217 <code>JOI<\/code> \u3092\u5909\u63db\u3059\u308b\u3068 <code>MRL<\/code> \u304c\u5f97\u3089\u308c\uff0c \u3053\u306e\u65b9\u6cd5\u3067\u5909\u63db\u3055\u308c\u305f\u6587\u5b57\u5217 <code>FURDWLD<\/code> \u306e\u5143\u306e\u6587\u5b57\u5217\u306f <code>CROATIA<\/code> \u3067\u3042\u308b\uff0e<\/p>\r\n","input":"<p>\u5165\u529b\u306f1\u884c\u3060\u3051\u304b\u3089\u306a\u308a\uff0c \u305d\u306e1\u884c\u306f\u5927\u6587\u5b57\u306e\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u307f\u3067\u69cb\u6210\u3055\u308c\u308b\u6587\u5b57\u5217\u30921\u3064\u542b\u3080\uff0e<\/p>\r\n\r\n<p>\u5165\u529b\u3055\u308c\u308b\u6587\u5b57\u5217\u306e\u9577\u3055\u306f 1000 \u4ee5\u4e0b\u3067\u3042\u308b\uff0e<\/p>\r\n","output":"<p>\u63d0\u51fa\u3059\u308b\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306f\uff0c \u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u3092\u5143\u306b\u623b\u3057\u305f\u6587\u5b57\u5217\u3060\u3051\u3092\u542b\u30801\u884c\u304b\u3089\u306a\u308b\uff0e<\/p>\r\n","hint":"","original":"1","html_title":"0","problem_lang_tcode":"Japanese"}]

출처

Olympiad > Japanese Olympiad in Informatics > Japanese Olympiad in Informatics Qualification Round > JOI 2006/2007 예선 3번