-ic a-a a-b a-c a-i aaa aab aac aad aai aan aao aau ab- aba abb abc abd abi abn abo abu ac- aca acb acc acd aci acn aco acu ad- ada adb adc add adi adn ado adu ai- aia aib aic aid aii ain aio aiu an- ana anb anc and ani ann ano anu aoa aob aoc aod aoi aon aoo aou au- aua aub auc aud aui aun auo b-u baa bab bac bad bai ban bao bau bba bbb bbc bbd bbi bbn bbo bbu bca bcb bcc bcd bci bcn bco bcu bda bdb bdc bdd bdi bdo bdu bi- bia bib bic bid bii bin bio biu bna bnb bnc bnd bni bnn bno bnu boa bob boc bod boi bon boo bou bua bub buc bud bui bun buo buu c-- caa cab cac cad cai can cao cau cba cbb cbc cbd cbi cbn cbo cbu cca ccb ccc ccd cci ccn cco ccu cda cdb cdc cdd cdi cdn cdo cdu ci- cia cib cic cid cii cin cio ciu cn- cna cnb cnc cnd cni cnn cno cnu co- coa cob coc cod coi con coo cou cua cub cuc cud cui cun cuo cuu daa dab dac dad dai dan dao dau dba dbb dbc dbd dbi dbn dbo dbu dca dcb dcc dcd dci dcn dco dcu dda ddb ddc ddd ddi ddn ddo ddu di- dia dib dic did dii din dio diu dna dnb dnc dnd dni dnn dno doa dob doc dod doi don doo dou dua dub duc dud dui dun duo i-d ia- iaa iab iac iad iai ian iao iau iba ibb ibc ibd ibi ibn ibo ibu ica icb icc icd ici icn ico icu ida idb idc idd idi idn ido idu iia iib iic iid iii iin iio iiu in- ina inb inc ind ini inn ino inu io- ioa iob ioc iod ioi ion ioo iou iu- iua iub iuc iud iui n-i naa nab nac nad nai nan nao nau nba nbb nbc nbd nbi nbn nbo nbu nca ncb ncc ncd nci ncn nco ncu nda ndb ndc ndd ndi ndn ndo ndu nia nib nic nid nii nin nio niu nna nnb nnc nni nnn nno nnu no- noa nob noc nod noi non noo nou nua nub nuc nud nui nun nuo nuu o-i oaa oab oac oad oai oan oao oau ob- oba obb obc obd obi obn obo obu oc- oca ocb occ ocd oci ocn oco ocu oda odb odc odd odi odn odo odu oia oib oic oid oii oin oio oiu on- ona onb onc ond oni onn ono onu oo- ooa oob ooc ood ooi oon ooo ou- oua ouc oud oui oun ouo ua- uaa uab uac uad uai uan uao uau uba ubb ubc ubi ubn ubo ubu uca ucb ucc ucd uci ucn uco ucu uda udb udc udd udi udn udo udu uia uib uic uid uii uin uio uiu un- una unb unc und uni unn uno unu uoa uob uoc uod uon uoo uua uuc uun uuu