C11112331312111112111133133313331333132112312113313231333132322121111333122321   >>    C1111233131211111211113313331333133313211231211331323133313232212111133312232   <<    C11112331312111112111133133313331333132112312113313231333132322121111333122323   >>      C11112331312111112111133133313331333132112312113313231333132322121111333122322   >>