C3123121111113313121111331333133313331313311233133313232212122321   >>    C312312111111331312111133133313331333131331123313331323221212232   <<    C3123121111113313121111331333133313331313311233133313232212122323   >>      C3123121111113313121111331333133313331313311233133313232212122322   >>