C11112331312111112111133132313331333133313232212111113231121311   >>    C1111233131211111211113313231333133313331323221211111323112131   <<    C11112331312111112111133132313331333133313232212111113231121313   >>      C11112331312111112111133132313331333133313232212111113231121312   >>