-ic a-a a-b a-c a-i aaa aab aac aad aag aai aak aas ab- aba abb abc abd abg abi abk abs ac- aca acb acc acd acg aci ack acs ad- ada adb adc add adg adi adk ads ag- aga agb agc agd agg agi agk ags ai- aia aib aic aid aig aii aik ais aka akb akc akd akg aki akk aks as- asa asb asc asd asg asi ask ass baa bab bac bad bag bai bak bas bba bbb bbc bbd bbg bbi bbk bbs bca bcb bcc bcd bcg bci bck bcs bda bdb bdc bdd bdg bdi bdk bds bga bgb bgc bgd bgg bgi bgk bgs bi- bia bib bic bid big bii bik bis bka bkb bkc bkg bkk bks bsa bsb bsc bsd bsg bsi bsk bss c-- caa cab cac cad cag cai cak cas cba cbb cbc cbd cbg cbi cbk cbs cca ccb ccc ccd ccg cci cck ccs cda cdb cdc cdd cdg cdi cdk cds cga cgb cgc cgd cgg cgi cgs ci- cia cib cic cid cig cii cik cis cka ckb ckc ckd cki cks csa csb csc csd csg csi csk css daa dab dac dad dag dai dak das dba dbb dbc dbd dbg dbi dbk dbs dca dcb dcc dcd dcg dci dck dcs dda ddb ddc ddd ddg ddi ddk dds dga dgc dgd dgg dgi dgk dgs di- dia dib dic did dig dii dik dis dka dkb dkc dkg dki dkk dks dsa dsb dsc dsd dsg dsi dsk dss g-d gaa gab gac gad gag gai gak gas gba gbc gbd gbg gbi gbk gbs gca gcb gcc gcd gcg gci gck gcs gda gdb gdc gdd gdi gdk gds gga ggb ggc ggd ggg ggi ggs gia gib gic gid gig gii gik gis gka gkb gkd gks gsa gsb gsc gsd gsg gsi gsk gss i-d ia- iaa iab iac iad iag iai ias iba ibb ibc ibd ibg ibi ibk ibs ica icb icc icd icg ici ick ics ida idb idc idd idg idi idk ids iga igb igc igd igg igi igk igs iia iib iic iid iii iis ika ikb ikc iki ikk iks is- isa isb isc isd isg isi isk iss ka- kaa kab kac kad kag kai kak kas kba kbb kbc kbd kbi kbk kbs kca kcb kcc kcd kcg kci kck kcs kda kdb kdc kdg kdk kds kga kgb kgc kgd kgi kgs kia kib kic kid kig kii kik kis kkb kkc kki kkk kks ksa ksb ksc ksd ksg ksi ksk kss saa sab sac sad sag sai sak sas sba sbb sbc sbd sbg sbi sbk sbs sca scb scc scd scg sci sck scs sda sdb sdc sdd sdg sdi sdk sds sga sgb sgc sgd sgg sgi sgk sgs sia sib sic sid sig sii sik sis sk- ska skb skc skd skg ski skk sks ss- ssa ssb ssc ssd ssg ssi ssk sss