C11112331312111112111133133313231333132322121111133313223331221   >>    C1111233131211111211113313331323133313232212111113331322333122   <<    C11112331312111112111133133313231333132322121111133313223331223   >>      C11112331312111112111133133313231333132322121111133313223331222   >>