C1111233131211111211113313331333133313331333133313331333133313233311213121   >>    C111123313121111121111331333133313331333133313331333133313331323331121312   <<    C1111233131211111211113313331333133313331333133313331333133313233311213123   >>      C1111233131211111211113313331333133313331333133313331333133313233311213122   >>