divide list ['a', 'b', 'c', '1', '2', '3'] into three separate list

def divide_list(list):
  list1 = []
  list2 = []
  list3 = []
  for i in list:
    if i.isalpha():
      list1.append(i)
    if i.isnumeric():
      list2.append(i)
    if i.isalnum():
      list3.append(i)
  return list1, list2, list3

divide_list(['a', 'b', 'c', '1', '2', '3'])