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# 0804. Unique Morse Code Words

<https://leetcode.com/problems/unique-morse-code-words>

## Description

International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows:

* `'a'` maps to `".-"`,
* `'b'` maps to `"-..."`,
* `'c'` maps to `"-.-."`, and so on.

For convenience, the full table for the `26` letters of the English alphabet is given below:

```
[".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]
```

Given an array of strings `words` where each word can be written as a concatenation of the Morse code of each letter.

* For example, `"cab"` can be written as `"-.-..--..."`, which is the concatenation of `"-.-."`, `".-"`, and `"-..."`. We will call such a concatenation the **transformation** of a word.

Return *the number of different **transformations** among all words we have*.

**Example 1:**

```
**Input:** words = ["gin","zen","gig","msg"]
**Output:** 2
**Explanation:** The transformation of each word is:
"gin" -> "--...-."
"zen" -> "--...-."
"gig" -> "--...--."
"msg" -> "--...--."
There are 2 different transformations: "--...-." and "--...--.".
```

**Example 2:**

```
**Input:** words = ["a"]
**Output:** 1
```

**Constraints:**

* `1 <= words.length <= 100`
* `1 <= words[i].length <= 12`
* `words[i]` consists of lowercase English letters.

## ac

```java
```