-ic b-u bbb bbc bbf bbi bbo bbr bbs bbu bcb bcc bcf bci bco bcr bcs bcu bfb bfc bff bfi bfo bfr bfs bfu bi- bib bic bif bii bio bir bis biu bob boc bof boi boo bor bos bou brb brf bri bro brr brs bru bsb bsc bsf bsi bso bsr bss bsu bub buc buf bui buo bur bus buu c-- cbb cbc cbf cbi cbo cbr cbs cbu ccb ccc ccf cci cco ccr ccs ccu cfb cfc cff cfi cfo cfr cfs cfu ci- cib cic cif cii cio cir cis ciu co- cob coc cof coi coo cor cos cou crb crc crf cri cro crr crs cru csb csc csf csi cso csr css csu cub cuc cuf cui cuo cur cus cuu fbb fbc fbf fbi fbo fbr fbs fbu fcb fcc fcf fci fco fcr fcs fcu ffc fff ffi ffo ffr ffs ffu fib fic fif fii fir fis fiu fob foc fof foi foo for fos fou frb frc frf fri fro frr frs fru fsb fsc fsf fsi fso fsr fss fsu fub fuf fui fuo fur fus fuu i-f ibb ibc ibf ibi ibo ibr ibs ibu icb icc icf ici ico icr ics icu ifb ifc iff ifi ifo ifr ifs ifu iib iic iif iii iio iir iis iiu io- iob ioc iof ioi ioo ior ios iou ir- irb irc irf iri iro irr irs iru is- isb isc isf isi iso isr iss isu iu- iub iuc iui iur ius o-i ob- obb obc obf obi obo obr obs obu oc- ocb occ ocf oci oco ocr ocs ocu of- ofb ofc off ofi ofo ofr ofs ofu oib oic oif oii oio oir ois oiu oo- oob ooc oof ooi ooo oor oos or- orb orc orf ori oro orr ors oru os- osb osc osf osi oso osr oss osu ou- ouc ouf oui ouo our ous rbb rbc rbf rbi rbo rbr rbs rbu rcb rcc rcf rci rco rcr rcs rcu rfb rfc rff rfi rfo rfr rfs rfu rib ric rif rii rio rir ris rob roc rof roi roo ror ros rou rrb rrc rrf rri rrr rrs rru rsb rsc rsf rsi rso rsr rss rsu rub ruc ruf rui ruo rur rus ruu sbb sbc sbf sbi sbo sbr sbs sbu scb scc scf sci sco scr scs scu sfb sfc sff sfi sfo sfr sfs sfu sib sic sif sii sio sir sis siu sob soc sof soi soo sor sos sou sr- srb src srf sri sro srr srs ss- ssb ssc ssf ssi sso ssr sss ssu sub suc suf sui suo sur sus suu ubb ubc ubf ubi ubo ubr ubs ubu ucb ucc ucf uci uco ucr ucs ucu ufc uff ufi ufo ufr ufs ufu uib uic uif uii uio uir uis uiu uob uoc uoo uor uos ur- urb urc urf uri uro urr urs uru usb usc usf usi uso usr uss usu uuc uur uus uuu