C1111233131211111211113313331333133313331333133313331333133313111231221   >>    C111123313121111121111331333133313331333133313331333133313331311123122   <<    C1111233131211111211113313331333133313331333133313331333133313111231223   >>      C1111233131211111211113313331333133313331333133313331333133313111231222   >>