class DoubleBreastedInterruptedKeyCipher {
  static String encode(String text) {
    // Define the vowel and consonant lists
    List<String> vowels = ['A', 'E', 'I', 'O', 'U'];
    List<String> consonants = [
      'B',
      'C',
      'D',
      'F',
      'G',
      'H',
      'J',
      'K',
      'L',
      'M',
      'N',
      'P',
      'Q',
      'R',
      'S',
      'T',
      'V',
      'W',
      'X',
      'Y',
      'Z'
    ];

    // Create a map for easy lookups
    Map<String, String> vowelMap = {};
    Map<String, String> consonantMap = {};

    // Fill the maps by mirroring the lists
    for (int i = 0; i < vowels.length; i++) {
      vowelMap[vowels[i]] = vowels[vowels.length - 1 - i];
    }

    for (int i = 0; i < consonants.length; i++) {
      consonantMap[consonants[i]] = consonants[consonants.length - 1 - i];
    }

    // Encode the text
    StringBuffer encoded = StringBuffer();
    for (int i = 0; i < text.length; i++) {
      String char = text[i].toUpperCase();
      if (vowelMap.containsKey(char)) {
        encoded.write(vowelMap[char]);
      } else if (consonantMap.containsKey(char)) {
        encoded.write(consonantMap[char]);
      } else {
        encoded.write(char); // Keep non-alphabet characters unchanged
      }
    }
    return encoded.toString();
  }

  static String decode(String text) {
    // The decoding process is the same as encoding for this cipher
    return encode(text);
  }
}