C11112331312111112111133132313331333133313232212111113331333233233213221   >>    C1111233131211111211113313231333133313331323221211111333133323323321322   <<    C11112331312111112111133132313331333133313232212111113331333233233213223   >>      C11112331312111112111133132313331333133313232212111113331333233233213222   >>