Кизин Кирилл, 118 группа SubString 12862			Юань Дунлян, 523 Группа SubString 13306
f	1	import collections	f	1	import collections
	2			2
	3	class SubString(collections.UserString):		3	class SubString(collections.UserString):
	4			4
	5	def __sub__(self, other):		5	def __sub__(self, other):
	6	import collections		6	import collections
n	7	cl = collections.Counter(self)	n	7	left_counter = collections.Counter(self)
	8	cr = collections.Counter(other)		8	right_counter = collections.Counter(other)
	9	ans_str = ''		9	result_str = ''
	10	for ch in self.data:		10	for char in self:
	11	if cl[ch] > 0 and cr[ch] > 0:		11	if left_counter[char] > 0 and right_counter[char] > 0:
	12	cl[ch] -= 1
	13	cr[ch] -= 1		12	left_counter[char] -= 1
				13	right_counter[char] -= 1
	14	else:		14	else:
n	15	ans_str += ch	n	15	result_str += char
	16	del collections		16	del collections
t	17	return self.__class__(ans_str)	t	17	return self.__class__(result_str)
	18	del collections		18	del collections

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