-ic a-a a-b a-c a-i aaa aab aac aad aai aan aao aar ab- aba abb abc abd abi abn abo abr ac- aca acb acc acd aci acn aco acr ad- ada adb adc add adi adn ado adr ai- aia aib aic aid aii ain aio air an- ana anb anc and ani ann ano anr aoa aob aoc aod aoi aon aoo aor ar- ara arb arc ard ari arn aro arr baa bab bac bad bai ban bao bar bba bbb bbc bbd bbi bbn bbo bbr bca bcb bcc bcd bci bcn bco bcr bda bdb bdc bdd bdi bdo bdr bi- bia bib bic bid bii bin bio bir bna bnb bnc bnd bni bnn bno bnr boa bob boc bod boi bon boo bor bra brb brd bri brn bro brr c-- caa cab cac cad cai can cao car cba cbb cbc cbd cbi cbn cbo cbr cca ccb ccc ccd cci ccn cco ccr cda cdb cdc cdd cdi cdn cdo cdr ci- cia cib cic cid cii cin cio cir cn- cna cnb cnc cnd cni cnn cno cnr co- coa cob coc cod coi con coo cor cra crb crc crd cri crn cro crr daa dab dac dad dai dan dao dar dba dbb dbc dbd dbi dbn dbo dbr dca dcb dcc dcd dci dcn dco dcr dda ddb ddc ddd ddi ddn ddo ddr di- dia dib dic did dii din dio dir dna dnb dnc dnd dni dnn dno dnr doa dob doc dod doi don doo dor dra drb drc drd dri drn dro drr i-d ia- iaa iab iac iad iai ian iao iar iba ibb ibc ibd ibi ibn ibo ibr ica icb icc icd ici icn ico icr ida idb idc idd idi idn ido idr iia iib iic iid iii iin iio iir in- ina inb inc ind ini inn ino inr io- ioa iob ioc iod ioi ion ioo ior ir- ira irb irc ird iri irn iro irr n-i naa nab nac nad nai nan nao nar nba nbb nbc nbd nbi nbn nbo nbr nca ncb ncc ncd nci ncn nco ncr nda ndb ndc ndd ndi ndn ndo ndr nia nib nic nid nii nin nio nir nna nnb nnc nni nnn nno no- noa nob noc nod noi non noo nor nra nrb nrc nrd nri nrn nro nrr o-i oaa oab oac oad oai oan oao oar ob- oba obb obc obd obi obn obo obr oc- oca ocb occ ocd oci ocn oco ocr oda odb odc odd odi odn odo odr oia oib oic oid oii oin oio oir on- ona onb onc ond oni onn ono onr oo- ooa oob ooc ood ooi oon ooo oor or- ora orb orc ord ori orn oro orr ra- raa rab rac rad rai ran rao rar rba rbb rbc rbd rbi rbn rbo rbr rca rcb rcc rcd rci rcn rco rcr rda rdb rdc rdd rdi rdn rdo rdr ria rib ric rid rii rin rio rir rna rnb rnc rnd rni rnn rno rnr roa rob roc rod roi ron roo ror rra rrb rrc rrd rri rrn rrr