-er a-a a-b a-i aaa aab aad aae aag aai aak aan aar ab- aba abb abd abe abg abi abk abn abr ad- ada adb add ade adg adi adk adn adr aea aeb aed aee aeg aei aek aen aer ag- aga agb agd age agg agi agk agn agr ai- aia aib aid aie aig aii aik ain air aka akb akd ake akg aki akk akn akr an- ana anb and ane ang ani ank ann anr ar- ara arb ard are arg ari ark arn arr baa bab bad bae bag bai bak ban bar bba bbb bbd bbe bbg bbi bbk bbn bbr bda bdb bdd bde bdg bdi bdk bdr be- bea beb bed bee beg bei bek ben ber bga bgb bgd bge bgg bgi bgk bgn bgr bi- bia bib bid bie big bii bik bin bir bka bkb bke bkg bkk bkn bkr bna bnb bnd bne bng bni bnk bnn bnr bra brb brd bre brg bri brk brn brr daa dab dad dae dag dai dak dan dar dba dbb dbd dbe dbg dbi dbk dbn dbr dda ddb ddd dde ddg ddi ddk ddn ddr de- dea deb ded dee deg dei dek den der dga dgd dge dgg dgi dgk dgn dgr di- dia dib did die dig dii dik din dir dka dkb dke dkg dki dkk dkr dna dnb dnd dne dng dni dnk dnn dnr dra drb drd dre drg dri drk drn drr eaa eab ead eae eag eai eak ean ear eba ebb ebd ebe ebg ebi ebk ebn ebr ed- eda edb edd ede edg edi edk edn edr eea eeb eed eee eeg eek een eer ega egb egd ege egg egi egn egr eia eib eid eie eig eii eik ein eir eka ekb ekd eke ekg eki ekr en- ena enb end ene eng eni enk enn enr era erb erd ere erg eri erk ern err g-d gaa gab gad gae gag gai gak gan gar gba gbd gbe gbg gbi gbk gbn gbr gda gdb gdd gde gdi gdk gdn gdr ge- gea geb ged gee geg gei gek gen ger gga ggb ggd ggg ggi ggn ggr gia gib gid gie gig gii gik gin gir gka gkb gkd gkn gna gnb gnd gne gni gnn gnr gra grb grd gre grg gri grk grn grr i-d ia- iaa iab iad iae iag iai ian iar iba ibb ibd ibe ibg ibi ibk ibn ibr ida idb idd ide idg idi idk idn idr ie- iea ied iee ieg iei iek ien ier iga igb igd ige igg igi igk ign igr iia iib iid iie iii iin iir ika ikb ike iki ikk ikr in- ina inb ind ine ing ini ink inn inr ir- ira irb ird ire irg iri irk irn irr ka- kaa kab kad kae kag kai kak kan kar kba kbb kbd kbe kbi kbk kbn kbr kda kdb kde kdg kdk kdr ke- kea keb ked kee keg kei kek ken ker kga kgb kgd kgi kia kib kid kie kig kii kik kin kir kkb kke kki kkk kkn kkr kn- kna knd kne kng kni knk knn knr kra krd krg kri krk krn krr n-i naa nab nad nae nag nai nak nan nar nba nbb nbd nbe nbg nbi nbk nbn nbr nda ndb ndd nde ndg ndi ndk ndn ndr ne- nea neb ned nee neg nei nek nen ner nga ngb ngd nge ngg ngi ngk ngn nia nib nid nie nig nii nik nin nir nka nke nki nkk nkn nkr nna nnb nne nng nni nnk nnn nra nrb nrd nre nrg nri nrk nrn nrr ra- raa rab rad rae rag rai rak ran rar rba rbb rbd rbe rbg rbi rbk rbn rbr rda rdb rdd rde rdg rdi rdn rdr re- rea reb red ree reg rei rek ren rer rga rgb rgd rge rgg rgi rgk rgn rgr ria rib rid rie rig rii rik rin rir rkb rke rkg rkk rna rnb rnd rng rni rnn rnr rra rrb rrd rrg rri rrk rrn rrr