You are given a string target.
Alice is going to type target on her computer using a special keyboard that has only two keys:
"a" to the string on the screen."c" changes to "d" and "z" changes to "a".Note that initially there is an empty string "" on the screen, so she can only press key 1.
Return a list of all strings that appear on the screen as Alice types target, in the order they appear, using the minimum key presses.
\n
Example 1:
\n\nInput: target = "abc"
\n\nOutput: ["a","aa","ab","aba","abb","abc"]
\n\nExplanation:
\n\nThe sequence of key presses done by Alice are:
\n\n"a"."aa"."ab"."aba"."abb"."abc".Example 2:
\n\nInput: target = "he"
\n\nOutput: ["a","b","c","d","e","f","g","h","ha","hb","hc","hd","he"]
\n\n
Constraints:
\n\n1 <= target.length <= 400target consists only of lowercase English letters.给你一个字符串 target。
Alice 将会使用一种特殊的键盘在她的电脑上输入 target，这个键盘 只有两个 按键：
'a'。'c' 变为 'd'，'z' 变为 'a'。注意，最初屏幕上是一个空字符串 \"\"，所以她 只能 按按键 1。
请你考虑按键次数 最少 的情况，按字符串出现顺序，返回 Alice 输入 target 时屏幕上出现的所有字符串列表。
\n\n
示例 1：
\n\n输入： target = \"abc\"
\n\n输出： [\"a\",\"aa\",\"ab\",\"aba\",\"abb\",\"abc\"]
\n\n解释：
\n\nAlice 按键的顺序如下：
\n\n\"a\"。\"aa\"。\"ab\"。\"aba\"。\"abb\"。\"abc\"。示例 2：
\n\n输入： target = \"he\"
\n\n输出： [\"a\",\"b\",\"c\",\"d\",\"e\",\"f\",\"g\",\"h\",\"ha\",\"hb\",\"hc\",\"hd\",\"he\"]
\n\n\n
提示：
\n\n1 <= target.length <= 400target 仅由小写英文字母组成。'a' using key 1.",
"Convert it to the required character using key 2."
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"sampleTestCase": "\"abc\"",
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