# ...existing code...min=Nonedeffind_min(items:list):returnmin(items)defodd_increment_even_decrement_no_modify(items)->list:return[x+1ifx%2elsex-1forxinitems]defodd_square_even_double_modify(items:list)->list:foriinrange(len(items)):ifitems[i]%2:items[i]=items[i]**2else:items[i]=items[i]*2# The function modifies in place, so no return neededdefmore_than_two_unique_vowels(sentence):vowels=set('aeiouAEIOU')words=sentence.split(',')return{wordforwordinwordsiflen(set(word)&vowels)>2}defsum_of_list_of_lists(lol):returnsum(sum(sublist)forsublistinlol)defflatten(lol):return[itemforsublistinlolforiteminsublist]defall_common(strings):ifnotstrings:return''common=set(strings[0])forsinstrings[1:]:common&=set(s)return''.join(sorted(common))defvocabulary(sentences):returnset(word.lower()forsentenceinsentencesforwordinsentence.split())