# Task 1: Keyboard Word
# Submitted by: Mohammad S Anwar
# 
# You are given an array of words.
# Write a script to print all the words in the given array that can be types using alphabet on only one row of the keyboard.
# 
# Let us assume the keys are arranged as below:
# Row 1: qwertyuiop
# Row 2: asdfghjkl
# Row 3: zxcvbnm
# 
# Example 1
# Input: @words = ("Hello","Alaska","Dad","Peace")
# Output: ("Alaska","Dad")
# 
# Example 2
# Input: @array = ("OMG","Bye")
# Output: ()

import re
import sys

if __name__ == "__main__":
    aclass = {'qwertyuiop', 'asdfghjkl', 'zxcvbnm'}
 
    output = set()
    for word in sys.argv[1:]:
        if len(list(filter(lambda x: re.search(r'^['+x+']+$', word.lower()), aclass))):
            output.add(word)
    print("Output: ({:s})".format(', '.join(output)))