-ic bbb bbc bbg bbi bbn bbo bbr bbs bbt bcb bcc bcg bci bcn bco bcr bcs bct bgb bgc bgg bgi bgn bgo bgr bgs bgt bi- bib bic big bii bin bio bir bis bit bnb bnc bng bni bnn bno bnr bns bnt bob boc bog boi bon boo bor bos bot brb brg bri brn bro brr brs brt bsb bsc bsg bsi bsn bso bsr bss bst btb btc btg bti btn bto btr bts btt c-- cbb cbc cbg cbi cbn cbo cbr cbs cbt ccb ccc ccg cci ccn cco ccr ccs cct cgb cgc cgg cgi cgn cgo cgr cgs cgt ci- cib cic cig cii cin cio cir cis cit cn- cnb cnc cng cni cnn cno cnr cns cnt co- cob coc cog coi con coo cor cos cot crb crc crg cri crn cro crr crs crt csb csc csg csi csn cso csr css cst ctb ctc ctg cti ctn cto ctr cts ctt gbc gbg gbi gbn gbo gbr gbs gbt gcb gcc gcg gci gcn gco gcr gcs gct ggb ggc ggg ggi ggn ggo ggr ggs ggt gib gic gig gii gin gio gir gis git gnb gnc gni gnn gno gnr gns gnt gob goc gog goi gon goo gor gos got grb grc grg gri grn gro grr grs grt gsb gsc gsg gsi gsn gso gsr gss gst gtb gtc gtg gti gtn gto gtr gts gtt ibb ibc ibg ibi ibn ibo ibr ibs ibt icb icc icg ici icn ico icr ics ict igb igc igg igi ign igo igr igs igt iib iic iii iin iio iir iis iit in- inb inc ing ini inn ino inr ins int io- iob ioc iog ioi ion ioo ior ios iot ir- irb irc irg iri irn iro irr irs irt is- isb isc isg isi isn iso isr iss ist itb itc itg iti itn ito its itt n-i nbb nbc nbg nbi nbn nbo nbr nbs nbt ncb ncc ncg nci ncn nco ncr ncs nct ngb ngc ngg ngi ngn ngo ngs ngt nib nic nig nii nin nio nir nis nit nnb nnc nng nni nnn nno nns nnt no- nob noc nog noi non noo nor nos not nrb nrc nrg nri nrn nro nrr nrs nrt nsb nsc nsg nsi nsn nso nsr nss nst ntb ntc ntg nti ntn nto ntr nts ntt o-i ob- obb obc obg obi obn obo obr obs obt oc- ocb occ ocg oci ocn oco ocr ocs oct ogc ogg ogi ogn ogo ogs ogt oib oic oii oin oio oir ois oit on- onb onc ong oni onn ono onr ons ont oo- oob ooc oog ooi oon ooo oor oos oot or- orb orc org ori orn oro orr ors ort os- osb osc osg osi osn oso osr oss ost ot- otb otc otg oti otn oto otr ots ott rbb rbc rbg rbi rbn rbo rbr rbs rbt rcb rcc rcg rci rcn rco rcr rcs rct rgb rgc rgg rgi rgn rgo rgr rgs rgt rib ric rig rii rin rio rir ris rit rnb rnc rng rni rnn rno rnr rns rnt rob roc rog roi ron roo ror ros rot rrb rrc rrg rri rrn rrr rrs rrt rsb rsc rsg rsi rsn rso rsr rss rst rtb rtc rtg rti rtn rto rtr rts rtt sbb sbc sbg sbi sbn sbo sbr sbs sbt scb scc scg sci scn sco scr scs sct sgb sgc sgg sgi sgn sgo sgr sgs sgt sib sic sig sii sin sio sir sis sit snb snc sng sni snn sno snr sns snt sob soc sog soi son soo sor sos sot sr- srb src srg sri srn sro srr srs srt ss- ssb ssc ssg ssi ssn sso ssr sss sst stb stc stg sti stn sto str sts stt tbb tbc tbg tbi tbn tbo tbr tbs tbt tcb tcc tcg tci tcn tco tcr tcs tct tgb tgc tgg tgi tgn tgo tgr tgs tgt tib tic tig tii tin tio tir tis tit tnb tnc tng tni tnn tno tnr tns tnt to- tob toc tog toi ton too tor tos tot trb trc trg tri trn tro trr trs trt tsb tsc tsg tsi tsn tso tsr tss tst ttb ttc ttg tti ttn tto ttr tts ttt