-ic bbb bbc bbd bbi bbn bbs bbt bby bcb bcc bcd bci bcn bcs bct bcy bdb bdc bdd bdi bds bdt bdy bi- bib bic bid bii bin bis bit biy bnb bnc bnd bni bnn bns bnt bsb bsc bsd bsi bsn bss bst bsy btb btc btd bti btn bts btt bty by- byc byd byi byn bys byt c-- cbb cbc cbd cbi cbn cbs cbt cby ccb ccc ccd cci ccn ccs cct cdb cdc cdd cdi cdn cds cdt cdy ci- cib cic cid cii cin cis cit cn- cnb cnc cnd cni cnn cns cnt cny csb csc csd csi csn css cst csy ctb ctc ctd cti ctn cts ctt cty cyb cyc cyd cyn cys cyt dbb dbc dbd dbi dbn dbs dbt dby dcb dcc dcd dci dcn dcs dct ddb ddc ddd ddi ddn dds ddt ddy di- dib dic did dii din dis dit diy dnb dnc dnd dni dnn dns dnt dny dsb dsc dsd dsi dsn dss dst dsy dtb dtc dtd dti dtn dts dtt dty dy- dyb dyc dyd dyn dys dyy i-d ibb ibc ibd ibi ibn ibs ibt iby icb icc icd ici icn ics ict icy idb idc idd idi idn ids idt idy iib iic iid iii iin iis iit in- inb inc ind ini inn ins int iny is- isb isc isd isi isn iss ist isy itb itc itd iti itn its itt ity iyc iys iyt iyy n-i nbb nbc nbd nbi nbn nbs nbt ncb ncc ncd nci ncn ncs nct ndb ndc ndd ndi ndn nds ndt ndy nib nic nid nii nin nis nit nnb nnc nni nnn nns nnt nsb nsc nsd nsi nsn nss nst nsy ntb ntc ntd nti ntn nts ntt nyc nyd nyn nys nyt nyy sbb sbc sbd sbi sbn sbs sbt sby scb scc scd sci scn scs sct sdb sdc sdd sdi sdn sds sdt sdy sib sic sid sii sin sis sit snb snc snd sni snn sns snt sny ss- ssb ssc ssd ssi ssn sss sst stb stc std sti stn sts stt sty sy- syb syc syd syi syn sys syt tbb tbc tbd tbi tbn tbs tbt tcb tcc tcd tci tcn tcs tct tdb tdc tdd tdi tdn tds tdt tdy tib tic tid tii tin tis tit tiy tnb tnc tnd tni tnn tns tnt tsb tsc tsd tsi tsn tss tst tsy ttb ttc ttd tti ttn tts ttt tty tyc tyd tyn tys tyt ybc ybi ybs yby ycc ycd yci ycs ycy ydn yds ydt ydy yid yii yin yis yit ynd ynn yns yny ysb ysc ysi yss yst ysy ytc ytd ytn yts ytt yyb yyc yys yyt yyy