C1111233131211111211113313331333133313331312331333133112312111133221231   >>    C111123313121111121111331333133313331333131233133313311231211113322123   <<    C1111233131211111211113313331333133313331312331333133112312111133221233   >>      C1111233131211111211113313331333133313331312331333133112312111133221232   >>