-ic b-p bbb bbc bbi bbo bbp bbr bbs bcb bcc bci bco bcp bcr bcs bi- bib bic bii bio bip bir bis bob boc boi boo bop bor bos bpb bpc bpi bpo bpp bpr bps brb bri bro brp brr brs bsb bsc bsi bso bsp bsr bss c-- cbb cbc cbi cbo cbp cbr cbs ccb ccc cci cco ccp ccr ccs ci- cib cic cii cio cip cir cis co- cob coc coi coo cop cor cos cpb cpc cpi cpo cpp cpr cps crb crc cri cro crp crr crs csb csc csi cso csp csr css ibb ibc ibi ibo ibp ibr ibs icb icc ici ico icp icr ics iib iic iii iio iip iir iis io- iob ioc ioi ioo iop ior ios ipb ipc ipi ipo ipp ipr ips ir- irb irc iri iro irp irr irs is- isb isc isi iso isp isr iss o-i ob- obb obc obi obo obp obr obs oc- ocb occ oci oco ocp ocr ocs oib oic oii oio oip oir ois oo- oob ooc ooi ooo oop oor oos op- opb opc opi opo opp opr ops or- orb orc ori oro orp orr ors os- osb osc osi oso osp osr oss p-p pbb pbc pbi pbo pbp pbr pbs pcb pcc pci pco pcp pcr pcs pib pic pii pio pip pir pis pob poc poi poo pop por pos ppb ppc ppi ppo ppp ppr pps prb prc pri pro prp prr prs ps- psb psc psi pso psp psr pss rbb rbc rbi rbo rbp rbr rbs rcb rcc rci rco rcp rcr rcs rib ric rii rio rip rir ris rob roc roi roo rop ror ros rpb rpc rpi rpo rpp rpr rps rrb rrc rri rrp rrr rrs rsb rsc rsi rso rsp rsr rss sbb sbc sbi sbo sbp sbr sbs scb scc sci sco scp scr scs sib sic sii sio sip sir sis sob soc soi soo sop sor sos spb spc spi spo spp spr sps sr- srb src sri sro srp srr srs ss- ssb ssc ssi sso ssp ssr sss

bbbb bbbs bbci bbpr bbrc bcbc bcbp bcbs bccc bcci bccs bcis bcor bcos bcpp bcps bcrs bcsc bcss bibb bibi bibo bibs bicc bici bico bics biis bio- bioc bioi bios bipp bips birb biri biro birr birs bis- bisc biso bisp biss bobb bobi bobo bobs boco bocs boi- boii bois boob booc boop boor boos bopp bops bor- bori boro borr bors bosc bosi boso boss bpcp bprc brcb bric brio bris brob broc broo bror bros brrr brrs brsb brsr bsci bscp bscs bsic bsos bspp bspr bssc c-bo cbbc cbbs cbcc cbcp cbcr cbcs cbir cbpc cbpp cbsc cbsi ccbc cccb cccc ccci cccp cccs ccic ccii ccip ccir ccis ccob ccoc ccpp ccpr ccps ccrc ccri ccrp ccrs ccsi ccsp ccss cibc cibi cibo cicc cici cico cicr cics ciii ciis ciob cior cios cipo cipp cips cirb circ ciri ciro cirr cirs cis- cisc cisp cisr ciss cobb cobi cobo cobs coco cocp coip coir cois coob coop coos copi copo copp copr cops cor- corb corc cori coro corp corr cors cosc cosi coso cosp coss cpbc cpcs cpic cpio cpos cpps cpri cprs cpsc cpso cpsr crbc crcc crcr crib cric crip cris crob croc croo crop cror crpc crps crsp crss cscb cscc csci csco cscr cscs csib csio csir csis csob csor csos cspb cspc cspi csps csrc csrs cssr ibcs ibis ibos ibrc ibri ibro ibss icbc icbp icbs iccb iccc icci icco iccp iccr iccs icis icoc icor icos icpc icpo icps icrc icrr icrs icsb icsc icsi icsp icsr icss iiii iiio iiis iioi iioo iiop iios iirc iirs iisc iisi iisp iisr iobi ioci iocp ioii ioio iooi iooo ioos iops iori iors ioso ipcc ipcs ipop ipos ippc ippo ippr ipri ipsc ipsi ipso ipsp ipss irbp ircc ircs iri- iric irio irip iris irob iroc irop irpc irps irrc irri irrs irsp iscc isci isco iscp iscr iscs isic isis iso- isoc isop isor isos ispc ispr isps isri isrp issc issi isso issp issr isss obbo obis oboi obor obos obri obro obsr obss ocbc occc occi ocis ocos ocpp ocro ocrr ocrs oici oiii oios oipc oisc oobi oocr oooo ooos oops oosi opic opii opio opis opo- opor opos oppi oppo opps opsi orbb orbi orbo orbs orci orco orcs ori- oric orio oris oro- oror oros orpc orpi orps orri orro orrs orsi orso osbp oscc osci osco osii osip osis osoi osoo osor osos osro ossb ossi osso pbcc pboc pbrs pbsp pcbc pcbs pccc pccs pcip pcos pcpb pcpp pcps pcrc pcso pibb pibi picc pici pico picr pics piip piob pipi pipo pipp pips pirc piri piro pirr pirs pisi piso piss pobo pobs poco pocs poio pois poop poor poos pop- popc popi popo popp pops porb porc pori poro porr pors posb posi poso poss ppcc ppci ppcs ppib ppic ppos pppo pppp ppps pprc ppss prbc prbs prcc prcp prcs pri- prii pris pro- prob proc proo prop pros prps prri prrs prsc prsi prso prss psbr psci psco psip psis psoc psoi psos pspi pspp pspr psps psrp pssc psso rbbb rbbr rbbs rbis rbsp rbss rcbc rcbo rccb rccc rccs rcic rcis rcos rcpi rcpo rcps rcsc rcsi rcss rib- ribo ribs ricc rico rics riis rios ripi ripp ripr rips riri rirs risc risi riso risp riss rob- robb robi robo robs rocc roco rocs roio roir rois roob rooi roop roor roos ropo rops rorc rori roro rosc rosi roso rosp ross rpcs rpii rpob rpos rpps rrrr rrsp rsbi rscc rscs rsis rsos rspb rspo rsps s-ib s-ic s-ii s-os sbbs sbcc sbcs sbic sbor sbsi sbsp scbi sccc sccp sccs sci- scic scio scip scir scis scob scoo scop scor scpb scpi scpo scps scr- scrc