a-a a-b a-i aaa aab aad aai aan aao ab- aba abb abd abi abn abo ad- ada adb add adi adn ado ai- aia aib aid aii ain aio an- ana anb and ani ann ano aoa aob aod aoi aon aoo baa bab bad bai ban bao bba bbb bbd bbi bbn bbo bda bdb bdd bdi bdo bi- bia bib bid bii bin bio bna bnb bnd bni bnn bno boa bob bod boi bon boo daa dab dad dai dan dao dba dbb dbd dbi dbn dbo dda ddb ddd ddi ddn ddo di- dia dib did dii din dio dna dnb dnd dni dnn dno doa dob dod doi don doo i-d ia- iaa iab iad iai ian iao iba ibb ibd ibi ibn ibo ida idb idd idi idn ido iia iib iid iii iin iio in- ina inb ind ini inn ino io- ioa iob iod ioi ion ioo n-i naa nab nad nai nan nao nba nbb nbd nbi nbn nbo nda ndb ndd ndi ndn ndo nia nib nid nii nin nio nna nnb nni nnn nno no- noa nob nod noi non noo o-i oaa oab oad oai oan oao ob- oba obb obd obi obn obo oda odb odd odi odn odo oia oib oid oii oin oio on- ona onb ond oni onn ono oo- ooa oob ood ooi oon ooo