-ic bbb bbc bbf bbi bbk bbl bbm bbr bbs bcb bcc bcf bci bck bcl bcm bcr bcs bfb bfc bff bfi bfl bfm bfr bfs bi- bib bic bif bii bik bil bim bir bis bkb bkc bkf bkk bkl bkm bkr bks blb blc blf bli blk bll blm blr bls bmb bmc bmf bmi bmk bml bmm bmr bms brb brf bri brk brl brm brr brs bsb bsc bsf bsi bsk bsl bsm bsr bss c-- cbb cbc cbf cbi cbk cbl cbm cbr cbs ccb ccc ccf cci cck ccl ccm ccr ccs cfb cfc cff cfi cfk cfl cfm cfr cfs ci- cib cic cif cii cik cil cim cir cis ckb ckc cki ckm cks cl- clb clc clf cli clk cll clm clr cls cmb cmc cmf cmi cmk cml cmm cmr cms crb crc crf cri crk crl crm crr crs csb csc csf csi csk csl csm csr css fbb fbc fbf fbi fbk fbl fbm fbr fbs fcb fcc fcf fci fck fcl fcm fcr fcs ffc fff ffi ffk ffl ffm ffr ffs fib fic fif fii fik fil fim fir fis fkb fkc fkf fki fkk fkl fkm flb flc flf fli fll flm flr fls fmb fmc fmf fmi fml fmm fmr fms frb frc frf fri frk frl frm frr frs fsb fsc fsf fsi fsk fsl fsm fsr fss i-f ibb ibc ibf ibi ibk ibl ibm ibr ibs icb icc icf ici ick icl icm icr ics ifb ifc iff ifi ifl ifm ifr ifs iib iic iif iii iil iim iir iis ikb ikc ikf iki ikk ikl ikr iks il- ilb ilc ilf ili ilk ill ilm ilr ils im- imb imc imf imi iml imm ims ir- irb irc irf iri irk irl irm irr irs is- isb isc isf isi isk isl ism isr iss kbb kbc kbf kbi kbk kbl kbm kbr kbs kcb kcc kci kck kcl kcm kcr kcs kfc kff kfi kfm kfs kib kic kif kii kik kil kim kir kis kkb kkc kki kkk kkl kkm kkr kks kl- klb klc klf kli klm klr kls kmb kmc kmf kmi kmk kml kmm kms krc krf kri krk krl krr krs ksb ksc ksf ksi ksk ksl ksm ksr kss lbb lbc lbf lbi lbk lbl lbm lbr lbs lcb lcc lcf lci lck lcl lcm lcr lcs lfb lfc lff lfi lfk lfl lfm lfr lfs lib lic lif lii lik lil lim lir lis lkb lkl lkr lks llb llc llf lli llk lll llm llr lls lmb lmc lmf lmi lmk lml lmm lmr lms lrb lrc lrf lri lrk lrm lrr lrs lsb lsc lsf lsi lsk lsl lsm lsr lss m-f m-r mbb mbc mbf mbi mbk mbl mbm mbr mbs mc- mcb mcc mcf mci mck mcl mcm mcr mcs mfb mfc mff mfi mfl mfm mfr mfs mi- mib mic mif mii mik mil mim mir mis mkb mkc mkk mkl mkm mkr mks mlb mlc mlf mli mlk mll mlm mlr mls mmb mmc mmf mmi mmk mml mmm mmr mms mrb mrc mrf mri mrk mrl mrm mrr mrs msb msc msf msi msk msl msm msr mss rbb rbc rbf rbi rbk rbl rbm rbr rbs rcb rcc rcf rci rcl rcm rcr rcs rfb rfc rff rfi rfk rfl rfm rfr rfs rib ric rif rii rik ril rim rir ris rkb rkc rkf rkk rkm rks rlc rlf rli rll rlm rlr rls rmb rmc rmf rmi rml rmm rmr rms rrb rrc rrf rri rrk rrl rrm rrr rrs rsb rsc rsf rsi rsk rsl rsm rsr rss sbb sbc sbf sbi sbk sbl sbm sbr sbs scb scc scf sci sck scl scm scr scs sfb sfc sff sfi sfk sfl sfm sfr sfs sib sic sif sii sik sil sim sir sis sk- skb skc skf ski skk skl skm skr sks slb slc slf sli slk sll slm slr sls smb smc smf smi smk sml smm smr sms sr- srb src srf sri srk srl srm srr srs ss- ssb ssc ssf ssi ssk ssl ssm ssr sss