bbb bbd bbi bbo bbr bbt bbx bdb bdd bdi bdo bdr bdt bdx bi- bib bid bii bio bir bit bix bob bod boi boo bor bot box brb brd bri bro brr brt brx btb btd bti bto btr btt btx bxb bxd bxi bxo bxx dbb dbd dbi dbo dbr dbt dbx ddb ddd ddi ddo ddr ddt ddx di- dib did dii dio dir dit dix dob dod doi doo dor dot dox drb drd dri dro drr drt drx dtb dtd dti dto dtr dtt dtx dxd dxi dxo dxr dxt dxx i-d ibb ibd ibi ibo ibr ibt ibx idb idd idi ido idr idt idx iib iid iii iio iir iit iix io- iob iod ioi ioo ior iot ir- irb ird iri iro irr irt irx itb itd iti ito itt itx ixi o-i ob- obb obd obi obo obr obt obx odb odd odi odo odr odt oib oid oii oio oir oit oo- oob ood ooi ooo oor oot oox or- orb ord ori oro orr ort orx ot- otb otd oti oto otr ott ox- oxb oxi oxo oxt oxx rbb rbd rbi rbo rbr rbt rbx rdb rdd rdi rdo rdr rdt rdx rib rid rii rio rir rit rix rob rod roi roo ror rot rox rrb rrd rri rrr rrt rtb rtd rti rto rtr rtt rtx rxr t-x tbb tbd tbi tbo tbr tbt tdb tdd tdi tdo tdr tdt tdx tib tid tii tio tir tit tix to- tob tod toi too tor tot tox trb trd tri tro trr trt trx ttb ttd tti tto ttr ttt ttx txi txt xbr xbx xdb xdi xdr xdt xii xio xit xix xod xoi xoo xor xot xox xrd xrt xrx xti xtr xtx xxi xxo xxx