-ic a-a a-b a-c a-i aaa aab aac aad aag aai aao aar ab- aba abb abc abd abg abi abo abr ac- aca acb acc acd acg aci aco acr ad- ada adb adc add adg adi ado adr ag- aga agb agc agd agg agi ago agr ai- aia aib aic aid aig aii aio air aoa aob aoc aod aog aoi aoo aor ar- ara arb arc ard arg ari aro arr baa bab bac bad bag bai bao bar bba bbb bbc bbd bbg bbi bbo bbr bca bcb bcc bcd bcg bci bco bcr bda bdb bdc bdd bdg bdi bdo bdr bga bgb bgc bgd bgg bgi bgo bgr bi- bia bib bic bid big bii bio bir boa bob boc bod bog boi boo bor bra brb brd brg bri bro brr c-- caa cab cac cad cag cai cao car cba cbb cbc cbd cbg cbi cbo cbr cca ccb ccc ccd ccg cci cco ccr cda cdb cdc cdd cdg cdi cdo cdr cga cgb cgc cgd cgg cgi cgo cgr ci- cia cib cic cid cig cii cio cir co- coa cob coc cod cog coi coo cor cra crb crc crd crg cri cro crr daa dab dac dad dag dai dao dar dba dbb dbc dbd dbg dbi dbo dbr dca dcb dcc dcd dcg dci dco dcr dda ddb ddc ddd ddg ddi ddo ddr dga dgc dgd dgg dgi dgr di- dia dib dic did dig dii dio dir doa dob doc dod dog doi doo dor dra drb drc drd drg dri dro drr g-d gaa gab gac gad gag gai gao gar gba gbc gbd gbg gbi gbo gbr gca gcb gcc gcd gcg gci gco gcr gda gdb gdc gdd gdi gdo gdr gga ggb ggc ggd ggg ggi ggo ggr gia gib gic gid gig gii gio gir goa gob goc god gog goi goo gor gra grb grc grd grg gri gro grr i-d ia- iaa iab iac iad iag iai iao iar iba ibb ibc ibd ibg ibi ibo ibr ica icb icc icd icg ici ico icr ida idb idc idd idg idi ido idr iga igb igc igd igg igi igo igr iia iib iic iid iii iio iir io- ioa iob ioc iod iog ioi ioo ior ir- ira irb irc ird irg iri iro irr o-i oaa oab oac oad oag oai oao oar ob- oba obb obc obd obg obi obo obr oc- oca ocb occ ocd ocg oci oco ocr oda odb odc odd odg odi odo odr oga ogc ogd ogg ogi ogo oia oib oic oid oii oio oir oo- ooa oob ooc ood oog ooi ooo oor or- ora orb orc ord org ori oro orr ra- raa rab rac rad rag rai rao rar rba rbb rbc rbd rbg rbi rbo rbr rca rcb rcc rcd rcg rci rco rcr rda rdb rdc rdd rdg rdi rdo rdr rga rgb rgc rgd rgg rgi rgo rgr ria rib ric rid rig rii rio rir roa rob roc rod rog roi roo ror rra rrb rrc rrd rrg rri rrr