-ic b-p bbb bbc bbd bbi bbo bbp bbs bcb bcc bcd bci bco bcp bcs bdb bdc bdd bdi bdo bdp bds bi- bib bic bid bii bio bip bis bob boc bod boi boo bop bos bpb bpc bpd bpi bpo bpp bps bsb bsc bsd bsi bso bsp bss c-- cbb cbc cbd cbi cbo cbp cbs ccb ccc ccd cci cco ccp ccs cdb cdc cdd cdi cdo cdp cds ci- cib cic cid cii cio cip cis co- cob coc cod coi coo cop cos cpb cpc cpd cpi cpo cpp cps csb csc csd csi cso csp css dbb dbc dbd dbi dbo dbp dbs dcb dcc dcd dci dco dcp dcs ddb ddc ddd ddi ddo ddp dds di- dib dic did dii dio dip dis dob doc dod doi doo dop dos dpb dpc dpd dpi dpo dpp dps dsb dsc dsd dsi dso dsp dss i-d ibb ibc ibd ibi ibo ibp ibs icb icc icd ici ico icp ics idb idc idd idi ido idp ids iib iic iid iii iio iip iis io- iob ioc iod ioi ioo iop ios ipb ipc ipd ipi ipo ipp ips is- isb isc isd isi iso isp iss o-i ob- obb obc obd obi obo obp obs oc- ocb occ ocd oci oco ocp ocs odb odc odd odi odo odp ods oib oic oid oii oio oip ois oo- oob ooc ood ooi ooo oop oos op- opb opc opd opi opo opp ops os- osb osc osd osi oso osp oss p-p pbb pbc pbd pbi pbo pbp pbs pcb pcc pcd pci pco pcp pcs pdb pdc pdd pdi pdo pdp pds pib pic pid pii pio pip pis pob poc pod poi poo pop pos ppb ppc ppd ppi ppo ppp pps ps- psb psc psd psi pso psp pss sbb sbc sbd sbi sbo sbp sbs scb scc scd sci sco scp scs sdb sdc sdd sdi sdo sdp sds sib sic sid sii sio sip sis sob soc sod soi soo sop sos spb spc spd spi spo spp sps ss- ssb ssc ssd ssi sso ssp sss