#
# https://www.careercup.com/question?id=5761370824900608
#
# Given a dictionary, find all pairs of words that,
# when concatenated together, form a palindrome.
# 'none', 'xenon' - 'nonexenon' is a palindrome
# 'none', 'xexenon' - 'nonexexenon' is a palindrome
