-er a-a a-b a-i aaa aab aad aae aah aai aan aar ab- aba abb abd abe abh abi abn abr ad- ada adb add ade adh adi adn adr aea aeb aed aee aeh aei aen aer aha ahb ahd ahe ahh ahi ahn ahr ai- aia aib aid aie aih aii ain air an- ana anb and ane anh ani ann anr ar- ara arb ard are arh ari arn arr baa bab bad bae bah bai ban bar bba bbb bbd bbe bbh bbi bbn bbr bda bdb bdd bde bdh bdi bdr be- bea beb bed bee beh bei ben ber bha bhb bhd bhe bhh bhi bhr bi- bia bib bid bie bih bii bin bir bna bnb bnd bne bni bnn bnr bra brb brd bre brh bri brn brr daa dab dad dae dah dai dan dar dba dbb dbd dbe dbh dbi dbn dbr dda ddb ddd dde ddh ddi ddn ddr de- dea deb ded dee deh dei den der dh- dha dhb dhd dhe dhh dhi dhr di- dia dib did die dih dii din dir dna dnb dnd dne dnh dni dnn dnr dra drb drd dre dri drn drr eaa eab ead eae eah eai ean ear eba ebb ebd ebe ebh ebi ebn ebr ed- eda edb edd ede edh edi edn edr eea eeb eed eee een eer eha ehb ehd ehe ehh ehi ehn ehr eia eib eid eie eii ein eir en- ena enb end ene enh eni enn enr era erb erd ere erh eri ern err h-i haa hab had hae hah hai han har hba hbb hbd hbe hbh hbi hbn hbr hda hdb hdd hde hdh hdi hdn hdr he- hea heb hed hee heh hei hen her hha hhb hhd hhe hhh hhi hhn hhr hia hib hid hie hih hii hin hir hna hnb hnd hne hnh hnn hr- hra hrb hrd hre hrh hri hrn hrr i-d ia- iaa iab iad iae iah iai ian iar iba ibb ibd ibe ibh ibi ibn ibr ida idb idd ide idh idi idn idr ie- iea ied iee iei ien ier iha ihb ihd ihe ihh ihi ihn ihr iia iib iid iie iih iii iin iir in- ina inb ind ine inh ini inn inr ir- ira irb ird ire iri irn irr n-i naa nab nad nae nah nai nan nar nba nbb nbd nbe nbi nbn nbr nda ndb ndd nde ndh ndi ndn ndr ne- nea neb ned nee neh nei nen ner nha nhb nhd nhe nhh nhi nhn nhr nia nib nid nie nih nii nin nir nna nnb nne nnh nni nnn nra nrb nrd nre nri nrn nrr ra- raa rab rad rae rah rai ran rar rba rbb rbd rbe rbh rbi rbn rbr rda rdb rdd rde rdh rdi rdn rdr re- rea reb red ree reh rei ren rer rh- rha rhb rhd rhe rhh rhi rhn rhr ria rib rid rie rih rii rin rir rna rnb rnd rnh rni rnn rnr rra rrb rrd rrh rri rrn rrr