C312312111111331312111133133313331333133322331323133313231313221   >>    C31231211111133131211113313331333133313332233132313331323131322   <<    C312312111111331312111133133313331333133322331323133313231313223   >>      C312312111111331312111133133313331333133322331323133313231313222   >>