a-a a-b a-i aaa aab aad aae aai aan aao ab- aba abb abd abe abi abn abo ad- ada adb add ade adi adn ado aea aeb aed aee aei aen aeo ai- aia aib aid aie aii ain aio an- ana anb and ane ani ann ano aoa aob aod aoe aoi aon aoo baa bab bad bae bai ban bao bba bbb bbd bbe bbi bbn bbo bda bdb bdd bde bdi bdo be- bea beb bed bee bei ben beo bi- bia bib bid bie bii bin bio bna bnb bnd bne bni bnn bno boa bob bod boe boi bon boo daa dab dad dae dai dan dao dba dbb dbd dbe dbi dbn dbo dda ddb ddd dde ddi ddn ddo de- dea deb ded dee dei den deo di- dia dib did die dii din dio dna dnb dnd dne dni dnn dno doa dob dod doe doi don doo eaa eab ead eae eai ean eao eba ebb ebd ebe ebi ebn ebo ed- eda edb edd ede edi edn edo eea eeb eed eee een eeo eia eib eid eie eii ein eio en- ena enb end ene eni enn eno eo- eoa eob eod eoe eoi eon eoo i-d ia- iaa iab iad iae iai ian iao iba ibb ibd ibe ibi ibn ibo ida idb idd ide idi idn ido ie- iea ied iee iei ien iia iib iid iie iii iin iio in- ina inb ind ine ini inn ino io- ioa iob iod ioe ioi ion ioo n-i naa nab nad nae nai nan nao nba nbb nbd nbe nbi nbn nbo nda ndb ndd nde ndi ndn ndo ne- nea neb ned nee nei nen neo nia nib nid nie nii nin nio nna nnb nne nni nnn nno no- noa nob nod noe noi non noo o-i oaa oab oad oae oai oan oao ob- oba obb obd obe obi obn obo oda odb odd ode odi odn odo oea oeb oed oee oei oen oeo oia oib oid oie oii oin oio on- ona onb ond one oni onn ono oo- ooa oob ood ooi oon ooo