Write a function that takes a string and returns an array containing binary numbers equivalent to the ASCII codes of the characters of the string. The binary strings should be eight digits long.
Example: `'man'` should return `[ '01101101', '01100001', '01101110' ]`
def word_to_bin(s):
    return ["{0:08b}".format(ord(c)) for c in s]
def word_to_bin(s):
    return ["{0:08b}".format(ord(c)) for c in s]