C312312111111331312111133133313331333131331123313331323221323132212231   >>    C31231211111133131211113313331333133313133112331333132322132313221223   <<    C312312111111331312111133133313331333131331123313331323221323132212233   >>      C312312111111331312111133133313331333131331123313331323221323132212232   >>