b-p bbb bbd bbi bbo bbp bbs bdb bdd bdi bdo bdp bds bi- bib bid bii bio bip bis bob bod boi boo bop bos bpb bpd bpi bpo bpp bps bsb bsd bsi bso bsp bss dbb dbd dbi dbo dbp dbs ddb ddd ddi ddo ddp dds di- dib did dii dio dip dis dob dod doi doo dop dos dpb dpd dpi dpo dpp dps dsb dsd dsi dso dsp dss i-d ibb ibd ibi ibo ibp ibs idb idd idi ido idp ids iib iid iii iio iip iis io- iob iod ioi ioo iop ios ipb ipd ipi ipo ipp ips is- isb isd isi iso isp iss o-i ob- obb obd obi obo obp obs odb odd odi odo odp ods oib oid oii oio oip ois oo- oob ood ooi ooo oop oos op- opb opd opi opo opp ops os- osb osd osi oso osp oss p-p pbb pbd pbi pbo pbp pbs pdb pdd pdi pdo pdp pds pib pid pii pio pip pis pob pod poi poo pop pos ppb ppd ppi ppo ppp pps ps- psb psd psi pso psp pss sbb sbd sbi sbo sbp sbs sdb sdd sdi sdo sdp sds sib sid sii sio sip sis sob sod soi soo sop sos spb spd spi spo spp sps ss- ssb ssd ssi sso ssp sss