C1111233131211111211113313331333133313331333133313331333133313332233132313121   >>    C111123313121111121111331333133313331333133313331333133313331333223313231312   <<    C1111233131211111211113313331333133313331333133313331333133313332233132313123   >>      C1111233131211111211113313331333133313331333133313331333133313332233132313122   >>