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add 804.py

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	`1`	`+class Solution(object):`
	`2`	`+ def uniqueMorseRepresentations(self, words):`
	`3`	`+ """`
	`4`	`+ :type words: List[str]`
	`5`	`+ :rtype: int`
	`6`	`+ """`
	`7`	`+ morse_map = {`
	`8`	`+ 'a': '.-',`
	`9`	`+ 'b': '-...',`
	`10`	`+ 'c': '-.-.',`
	`11`	`+ 'd': '-..',`
	`12`	`+ 'e': '.',`
	`13`	`+ 'f': '..-.',`
	`14`	`+ 'g': '--.',`
	`15`	`+ 'h': '....',`
	`16`	`+ 'i': '..',`
	`17`	`+ 'j': '.---',`
	`18`	`+ 'k': '-.-',`
	`19`	`+ 'l': '.-..',`
	`20`	`+ 'm': '--',`
	`21`	`+ 'n': '-.',`
	`22`	`+ 'o': '---',`
	`23`	`+ 'p': '.--.',`
	`24`	`+ 'q': '--.-',`
	`25`	`+ 'r': '.-.',`
	`26`	`+ 's': '...',`
	`27`	`+ 't': '-',`
	`28`	`+ 'u': '..-',`
	`29`	`+ 'v': '...-',`
	`30`	`+ 'w': '.--',`
	`31`	`+ 'x': '-..-',`
	`32`	`+ 'y': '-.--',`
	`33`	`+ 'z': '--..'`
	`34`	`+ }`
	`35`	`+ morse_words = []`
	`36`	`+ for word in words:`
	`37`	`+ morse_words.append("".join([morse_map[i] for i in word]))`
	`38`	`+ return len(set(morse_words))`
	`39`	`+`

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