# ---
# title: 500. Keyboard Row
# id: problem500
# author: Tian Jun
# date: 2020-10-31
# difficulty: Easy
# categories: Hash Table
# link: <https://leetcode.com/problems/keyboard-row/description/>
# hidden: true
# ---
# 
# Given a List of words, return the words that can be typed using letters of
# **alphabet** on only one row's of American keyboard like the image below.
# 
# 
# 
# ![](https://assets.leetcode.com/uploads/2018/10/12/keyboard.png)
# 
# 
# 
# **Example:**
# 
#     
#     
#     Input: ["Hello", "Alaska", "Dad", "Peace"]
#     Output: ["Alaska", "Dad"]
#     
# 
# 
# 
# **Note:**
# 
#   1. You may use one character in the keyboard more than once.
#   2. You may assume the input string will only contain letters of alphabet.
# 
# 
## @lc code=start
using LeetCode

## add your code here:
## @lc code=end
