-ic b-u bbb bbc bbf bbi bbl bbn bbr bbu bcb bcc bcf bci bcl bcn bcr bcu bfb bfc bff bfi bfl bfn bfr bfu bi- bib bic bif bii bil bin bir biu blb blc blf bli bll bln blr blu bnb bnc bnf bni bnl bnn bnr bnu brb brf bri brl brn brr bru bub buc buf bui bul bun bur buu c-- cbb cbc cbf cbi cbl cbn cbr cbu ccb ccc ccf cci ccl ccn ccr ccu cfb cfc cff cfi cfl cfn cfr cfu ci- cib cic cif cii cil cin cir ciu cl- clb clc clf cli cll cln clr clu cn- cnb cnc cnf cni cnl cnn cnr cnu crb crc crf cri crl crn crr cru cub cuc cuf cui cul cun cur cuu fbb fbc fbf fbi fbl fbn fbr fbu fcb fcc fcf fci fcl fcn fcr fcu ffc fff ffi ffl ffn ffr ffu fib fic fif fii fil fin fir fiu flb flc flf fli fll fln flr flu fnb fnc fnf fni fnl fnn fnr fnu frb frc frf fri frl frn frr fru fub fuf fui ful fun fur fuu i-f ibb ibc ibf ibi ibl ibn ibr ibu icb icc icf ici icl icn icr icu ifb ifc iff ifi ifl ifn ifr ifu iib iic iif iii iil iin iir iiu il- ilb ilc ilf ili ill iln ilr ilu in- inb inc inf ini inl inn inr inu ir- irb irc irf iri irl irn irr iru iu- iub iuc iui iur lbb lbc lbf lbi lbl lbr lbu lcb lcc lcf lci lcl lcn lcr lcu lfb lfc lff lfi lfl lfn lfr lfu lib lic lif lii lil lin lir liu llb llc llf lli lll lln llr llu lnb lnc lni lnl lnn lnr lnu lrb lrc lrf lri lrn lrr lru lub luc luf lui lul lun lur luu n-i nbb nbc nbf nbi nbl nbn nbr nbu ncb ncc ncf nci ncl ncn ncr ncu nfb nfc nff nfi nfl nfn nfr nfu nib nic nif nii nil nin nir niu nlb nlc nlf nli nll nln nlr nlu nnb nnc nnf nni nnl nnn nnu nrb nrc nrf nri nrl nrn nrr nru nub nuc nui nul nun nur nuu rbb rbc rbf rbi rbl rbn rbr rbu rcb rcc rcf rci rcl rcn rcr rcu rfb rfc rff rfi rfl rfn rfr rfu rib ric rif rii ril rin rir rlc rlf rli rll rln rlr rlu rnb rnc rni rnn rnr rnu rrb rrc rrf rri rrl rrn rrr rru rub ruc ruf rui run rur ruu ubb ubc ubf ubi ubl ubn ubr ubu ucb ucc ucf uci ucl ucn ucr ucu ufc uff ufi ufl ufn ufr ufu uib uic uif uii uil uin uir uiu ulb ulc ulf uli ull uln ulr ulu un- unb unc unf uni unl unn unr unu ur- urb urc urf uri url urn urr uru uuc uun uur uuu

bbbb bbci bbfc bbfn bbin bblb bbrc bcbc bccc bcci bccl bcfc bcnu bcru bcuc bffl bibb bibi bibl bicc bici biff bifi biin bili bill bilu bin- binc bini binn binu birb biri birl birn birr biru blcu blfc blic blin blir blni blrc blub bluf blur bnib bnin bnrr brcb brfc brfu bric bril brin brrr bruc brun bubb bubi bubu bucc buci bucu bufc buff bufr buic buif buin buir buiu bulb buli bull bulu bunb buni bunn bunu bur- burb buri burl burn burr buru cbbc cbcc cbcl cbcn cbcr cbcu cbfb cbfc cbir cblb cblc cbln cbrl cbrn ccbc ccbn cccb cccc cccf ccci cccl cccu ccfc ccff ccfi ccfl ccic ccii ccil ccir cclc ccli ccnb ccnc ccnf ccni ccnr ccnu ccrc ccrf ccri ccrl ccuc cfbc cfbn cfbr cfcb cfcf cfcl cfcn cffb cffr cfln cfnb cfni cfnr cfrb cfrn cfun cibc cibi cicc cici cicr cicu ciff cifl ciii cili cill cin- cinc cinf cini cirb circ ciri cirl cirr ciuc clib clic clif clii clin clir clri club clun cnbc cnbl cnci cnib cnic cnrc cnrr crbc crbu crcc crcr crfc crfl crib cric crif crin criu crlf crub crun cub- cubb cubi cucc cuci cucn cufc cuff cufi cui- cuif cuil cuin cuir culb culc cull curb curf curi curl curn curr fccf fcic fcii fcnl ffcc ffff ffii ffrr ffun ficc fifc fiff fifi fiii fiil fili fill filn fini finn firn flcl flic flii flin flnb flnc flub fluf flur fnci fnlc fnuf frbc frcc frcn frfc frib fric fril frin frub frun fubb fubu fuc- fuci fufc fuff fufu fuil fuir fuli full fulu funf fur- furi furl furn furr ibfi ibrc ibri icbc iccb iccc iccf icci iccl iccn iccr iccu icfb icll iclr icnb icnc icrc icrf icrr icru icub ifbb ific ifil ifni ifnr ifrb ifrf ifri iiii iirc iiuc ilbc ilic ilin ilir ill- illi ilni incb inci incl incr infi infl inni innr innu inri inui inul inun ircc ircu irfu iri- iric iril irin irlb irrc irri irul irun iucc iuiu lbcc lblr lcbc lccc lcfc lcfr lcrl lfcc libc libr libu licr liff lifl liii liin liir lilb lili lill lilu linc linn lirc liri lirl lirn lirr liru liuf liun llcc lllc llll lncr lrfc lric lrif lrrc lrrr luci luff lufu luif luin luli lull lulu luni lunn luri n-ii nbbc nbcc nbci nbfc nbfl nbic nbuf ncbc ncbi nccc nccf ncci nccn nccr nccu ncfc nclc ncln nclr ncnc ncrc ncri nfcu nfff nfib nfic nibi nicc nicf nici nicl nicu nifc niff niir niiu nili nill nilu nini ninl niru niur nlcc nlcf nlic nlrb nnnn nrfc nric nrlb nrrc nrrl nubc nubi nubl nuci nucu nuff nuin nuli null nunc nunn nurc nuri nurl nurn nurr nuru rbbb rbbr rbcl rcbc rccb rccc rcfc rcic rcnl rcnr rffc rffl rfic rib- ribu ricc riff rifu riif riin rill rilu rinf