1. front_x

# Given a list of strings, use regex to return a list with the strings

# in sorted order, except group all the strings that begin with 'x' first.

# e.g. ['mix', 'xyz', 'apple', 'xanadu', 'aardvark'] yields

# ['xanadu', 'xyz', 'aardvark', 'apple', 'mix']

can you help me to make a function like above?

input list is ['mix', 'xyz', 'apple', 'xanadu', 'aardvark']

function name is front_x