Split by Word Casing

import re

words = [str(item) for item in re.split("[,;:.!()\"\'\\\\/\[\] ]+", input())if item != ""]
lower_case = []
upper_case = []
mixed_case = []

for word in words:
    if re.compile("^[a-z]+$").match(word):
        lower_case.append(word)
    elif re.compile("^[A-Z]+$").match(word):
        upper_case.append(word)
    else:
        mixed_case.append(word)

print("Lower-case: ", end="")
print(", ".join(lower_case))
print("Mixed-case: ", end="")
print(", ".join(mixed_case))
print("Upper-case: ", end="")
print(", ".join(upper_case))