b-u bbb bbd bbi bbo bbr bbu bbx bdb bdd bdi bdo bdr bdu bdx bi- bib bid bii bio bir biu bix bob bod boi boo bor bou box brb brd bri bro brr bru brx bub bud bui buo bur buu bux bxb bxd bxi bxo bxx dbb dbd dbi dbo dbr dbu dbx ddb ddd ddi ddo ddr ddu ddx di- dib did dii dio dir diu dix dob dod doi doo dor dou dox drb drd dri dro drr dru drx dub dud dui duo dur dux dxd dxi dxo dxr dxx i-d ibb ibd ibi ibo ibr ibu ibx idb idd idi ido idr idu idx iib iid iii iio iir iiu iix io- iob iod ioi ioo ior iou ir- irb ird iri iro irr iru irx iu- iub iud iui iur ixi o-i ob- obb obd obi obo obr obu obx odb odd odi odo odr odu oib oid oii oio oir oiu oo- oob ood ooi ooo oor oox or- orb ord ori oro orr oru orx ou- oud oui ouo our ox- oxb oxi oxo oxx rbb rbd rbi rbo rbr rbu rbx rdb rdd rdi rdo rdr rdu rdx rib rid rii rio rir rix rob rod roi roo ror rou rox rrb rrd rri rrr rru rub rud rui ruo rur ruu rux rxr ubb ubi ubo ubr ubu ubx udb udd udi udo udr udu udx uib uid uii uio uir uiu uob uod uoo uor uox ur- urb urd uri uro urr uru urx uur uuu uxb uxo uxr uxu xbr xbx xdb xdi xdr xii xio xiu xix xod xoi xoo xor xox xrd xrx xui xxi xxo xxx