Given an array of strings?words, return?the words that can be typed using letters of the alphabet on only one row of American keyboard like the image below.

In the?American keyboard:

• the first row consists of the characters?"qwertyuiop",

• the second row consists of the characters?"asdfghjkl", and

• the third row consists of the characters?"zxcvbnm".

如果字符都在一行中能夠打出來(lái)，則可以輸出這個(gè)字符串，如果不行，就不輸出這個(gè)字符串；

類似官方的解答，將所有的字符所在的行數(shù)提前做好，判斷是否跟第一個(gè)都一樣，一樣就增加，不一樣就false，最后匯總，輸出，即可。

Runtime:?0 ms, faster than?100.00%?of?Java?online submissions for?Keyboard Row.

Memory Usage:?41.7 MB, less than?11.33%?of?Java?online submissions for?Keyboard Row.