-ic a-a a-b a-c a-i aaa aab aac aag aai aan aao aas ab- aba abb abc abg abi abn abo abs ac- aca acb acc acg aci acn aco acs ag- aga agb agc agg agi agn ago ags ai- aia aib aic aig aii ain aio ais an- ana anb anc ang ani ann ano ans aoa aob aoc aog aoi aon aoo aos as- asa asb asc asg asi asn aso ass baa bab bac bag bai ban bao bas bba bbb bbc bbg bbi bbn bbo bbs bca bcb bcc bcg bci bcn bco bcs bga bgb bgc bgg bgi bgn bgo bgs bi- bia bib bic big bii bin bio bis bna bnb bnc bng bni bnn bno bns boa bob boc bog boi bon boo bos bsa bsb bsc bsg bsi bsn bso bss c-- caa cab cac cag cai can cao cas cba cbb cbc cbg cbi cbn cbo cbs cca ccb ccc ccg cci ccn cco ccs cga cgb cgc cgg cgi cgn cgo cgs ci- cia cib cic cig cii cin cio cis cn- cna cnb cnc cng cni cnn cno cns co- coa cob coc cog coi con coo cos csa csb csc csg csi csn cso css gaa gab gac gag gai gan gao gas gba gbc gbg gbi gbn gbo gbs gca gcb gcc gcg gci gcn gco gcs gga ggb ggc ggg ggi ggn ggo ggs gia gib gic gig gii gin gio gis gna gnb gnc gni gnn gno gns goa gob goc gog goi gon goo gos gsa gsb gsc gsg gsi gsn gso gss ia- iaa iab iac iag iai ian iao ias iba ibb ibc ibg ibi ibn ibo ibs ica icb icc icg ici icn ico ics iga igb igc igg igi ign igo igs iia iib iic iii iin iio iis in- ina inb inc ing ini inn ino ins io- ioa iob ioc iog ioi ion ioo ios is- isa isb isc isg isi isn iso iss n-i naa nab nac nag nai nan nao nas nba nbb nbc nbg nbi nbn nbo nbs nca ncb ncc ncg nci ncn nco ncs nga ngb ngc ngg ngi ngn ngo ngs nia nib nic nig nii nin nio nis nna nnb nnc nng nni nnn nno nns no- noa nob noc nog noi non noo nos nsa nsb nsc nsg nsi nsn nso nss o-i oaa oab oac oag oai oan oao oas ob- oba obb obc obg obi obn obo obs oc- oca ocb occ ocg oci ocn oco ocs oga ogc ogg ogi ogn ogo ogs oia oib oic oii oin oio ois on- ona onb onc ong oni onn ono ons oo- ooa oob ooc oog ooi oon ooo oos os- osa osb osc osg osi osn oso oss saa sab sac sag sai san sao sas sba sbb sbc sbg sbi sbn sbo sbs sca scb scc scg sci scn sco scs sga sgb sgc sgg sgi sgn sgo sgs sia sib sic sig sii sin sio sis sna snb snc sng sni snn sno sns soa sob soc sog soi son soo sos ss- ssa ssb ssc ssg ssi ssn sso sss