C1111233131211111211113313331333133313331333133313331333133313233113313111221   >>    C111123313121111121111331333133313331333133313331333133313331323311331311122   <<    C1111233131211111211113313331333133313331333133313331333133313233113313111223   >>      C1111233131211111211113313331333133313331333133313331333133313233113313111222   >>