a-a a-b a-i aaa aab aad aae aag aai aan aao ab- aba abb abd abe abg abi abn abo ad- ada adb add ade adg adi adn ado aea aeb aed aee aeg aei aen aeo ag- aga agb agd age agg agi agn ago ai- aia aib aid aie aig aii ain aio an- ana anb and ane ang ani ann ano aoa aob aod aoe aog aoi aon aoo baa bab bad bae bag bai ban bao bba bbb bbd bbe bbg bbi bbn bbo bda bdb bdd bde bdg bdi bdo be- bea beb bed bee beg bei ben beo bga bgb bgd bge bgg bgi bgn bgo bi- bia bib bid bie big bii bin bio bna bnb bnd bne bng bni bnn bno boa bob bod boe bog boi bon boo daa dab dad dae dag dai dan dao dba dbb dbd dbe dbg dbi dbn dbo dda ddb ddd dde ddg ddi ddn ddo de- dea deb ded dee deg dei den deo dga dgd dge dgg dgi dgn di- dia dib did die dig dii din dio dna dnb dnd dne dng dni dnn dno doa dob dod doe dog doi don doo eaa eab ead eae eag eai ean eao eba ebb ebd ebe ebg ebi ebn ebo ed- eda edb edd ede edg edi edn edo eea eeb eed eee eeg een eeo ega egb egd ege egg egi egn ego eia eib eid eie eig eii ein eio en- ena enb end ene eng eni enn eno eo- eoa eob eod eoe eog eoi eon eoo g-d gaa gab gad gae gag gai gan gao gba gbd gbe gbg gbi gbn gbo gda gdb gdd gde gdi gdn gdo ge- gea geb ged gee geg gei gen geo gga ggb ggd ggg ggi ggn ggo gia gib gid gie gig gii gin gio gna gnb gnd gne gni gnn gno goa gob god goe gog goi gon goo i-d ia- iaa iab iad iae iag iai ian iao iba ibb ibd ibe ibg ibi ibn ibo ida idb idd ide idg idi idn ido ie- iea ied iee ieg iei ien iga igb igd ige igg igi ign igo iia iib iid iie iii iin iio in- ina inb ind ine ing ini inn ino io- ioa iob iod ioe iog ioi ion ioo n-i naa nab nad nae nag nai nan nao nba nbb nbd nbe nbg nbi nbn nbo nda ndb ndd nde ndg ndi ndn ndo ne- nea neb ned nee neg nei nen neo nga ngb ngd nge ngg ngi ngn ngo nia nib nid nie nig nii nin nio nna nnb nne nng nni nnn nno no- noa nob nod noe nog noi non noo o-i oaa oab oad oae oag oai oan oao ob- oba obb obd obe obg obi obn obo oda odb odd ode odg odi odn odo oea oeb oed oee oeg oei oen oeo oga ogd oge ogg ogi ogn ogo oia oib oid oie oii oin oio on- ona onb ond one ong oni onn ono oo- ooa oob ood oog ooi oon ooo