Extract consonants from a given string

consonantExtractor.py

def consonantExtractor(word):
  consonants = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
  res = []
  for chr in str(word):
	  if chr in consonants:
	      res.extend(chr)
  consonants = "".join(res)
  return(consonants)

print(consonantExtractor("Hello world!"))
# Output: "Hllwrld"

TODO: Make sure that diacritical consonants (such as č and ñ) are passed as consonants instead of vowels.