-ic a-a a-b a-c a-i aaa aab aac aag aai aao aas aau ab- aba abb abc abg abi abo abs abu ac- aca acb acc acg aci aco acs acu ag- aga agb agc agg agi ago ags agu ai- aia aib aic aig aii aio ais aiu aoa aob aoc aog aoi aoo aos aou as- asa asb asc asg asi aso ass asu au- aua aub auc aug aui auo aus b-u baa bab bac bag bai bao bas bau bba bbb bbc bbg bbi bbo bbs bbu bca bcb bcc bcg bci bco bcs bcu bga bgb bgc bgg bgi bgo bgs bgu bi- bia bib bic big bii bio bis biu boa bob boc bog boi boo bos bou bsa bsb bsc bsg bsi bso bss bsu bua bub buc bug bui buo bus buu c-- caa cab cac cag cai cao cas cau cba cbb cbc cbg cbi cbo cbs cbu cca ccb ccc ccg cci cco ccs ccu cga cgb cgc cgg cgi cgo cgs cgu ci- cia cib cic cig cii cio cis ciu co- coa cob coc cog coi coo cos cou csa csb csc csg csi cso css csu cua cub cuc cug cui cuo cus cuu gaa gab gac gag gai gao gas gau gba gbc gbg gbi gbo gbs gbu gca gcb gcc gcg gci gco gcs gcu gga ggb ggc ggg ggi ggo ggs ggu gia gib gic gig gii gio gis giu goa gob goc gog goi goo gos gou gsa gsb gsc gsg gsi gso gss gsu gu- gua gub guc gug gui guo gus guu ia- iaa iab iac iag iai iao ias iau iba ibb ibc ibg ibi ibo ibs ibu ica icb icc icg ici ico ics icu iga igb igc igg igi igo igs igu iia iib iic iii iio iis iiu io- ioa iob ioc iog ioi ioo ios iou is- isa isb isc isg isi iso iss isu iu- iua iub iuc iug iui ius o-i oaa oab oac oag oai oao oas oau ob- oba obb obc obg obi obo obs obu oc- oca ocb occ ocg oci oco ocs ocu oga ogc ogg ogi ogo ogs oia oib oic oii oio ois oiu oo- ooa oob ooc oog ooi ooo oos os- osa osb osc osg osi oso oss osu ou- oua ouc oui ouo ous saa sab sac sag sai sao sas sau sba sbb sbc sbg sbi sbo sbs sbu sca scb scc scg sci sco scs scu sga sgb sgc sgg sgi sgo sgs sgu sia sib sic sig sii sio sis siu soa sob soc sog soi soo sos sou ss- ssa ssb ssc ssg ssi sso sss ssu sua sub suc sug sui suo sus suu ua- uaa uab uac uag uai uao uas uau uba ubb ubc ubg ubi ubo ubs ubu uca ucb ucc ucg uci uco ucs ucu uga ugb ugc ugg ugi ugo ugs ugu uia uib uic uig uii uio uis uiu uoa uob uoc uog uoo uos usa usb usc usg usi uso uss usu uua uuc uug uus uuu