bbb bbd bbi bbo bbr bbs bbx bdb bdd bdi bdo bdr bds bdx bi- bib bid bii bio bir bis bix bob bod boi boo bor bos box brb brd bri bro brr brs brx bsb bsd bsi bso bsr bss bsx bxb bxd bxi bxo bxx dbb dbd dbi dbo dbr dbs dbx ddb ddd ddi ddo ddr dds ddx di- dib did dii dio dir dis dix dob dod doi doo dor dos dox drb drd dri dro drr drs drx dsb dsd dsi dso dsr dss dsx dxd dxi dxo dxr dxs dxx i-d ibb ibd ibi ibo ibr ibs ibx idb idd idi ido idr ids idx iib iid iii iio iir iis iix io- iob iod ioi ioo ior ios ir- irb ird iri iro irr irs irx is- isb isd isi iso isr iss ixi o-i ob- obb obd obi obo obr obs obx odb odd odi odo odr ods oib oid oii oio oir ois oo- oob ood ooi ooo oor oos oox or- orb ord ori oro orr ors orx os- osb osd osi oso osr oss osx ox- oxb oxi oxo oxx rbb rbd rbi rbo rbr rbs rbx rdb rdd rdi rdo rdr rds rdx rib rid rii rio rir ris rix rob rod roi roo ror ros rox rrb rrd rri rrr rrs rsb rsd rsi rso rsr rss rsx rxr rxs sbb sbd sbi sbo sbr sbs sbx sdb sdd sdi sdo sdr sds sib sid sii sio sir sis six sob sod soi soo sor sos sox sr- srb srd sri sro srr srs srx ss- ssb ssd ssi sso ssr sss ssx sxi sxs xbr xbx xdb xdi xdr xds xii xio xis xix xod xoi xoo xor xos xox xrd xrx xsb xsi xss xxi xxo xxx