-er a-a a-b a-i aaa aab aad aae aah aai aak aar ab- aba abb abd abe abh abi abk abr ad- ada adb add ade adh adi adk adr aea aeb aed aee aeh aei aek aer aha ahb ahd ahe ahh ahi ahk ahr ai- aia aib aid aie aih aii aik air aka akb akd ake akh aki akk akr ar- ara arb ard are arh ari ark arr baa bab bad bae bah bai bak bar bba bbb bbd bbe bbh bbi bbk bbr bda bdb bdd bde bdh bdi bdk bdr be- bea beb bed bee beh bei bek ber bha bhb bhd bhe bhh bhi bhk bhr bi- bia bib bid bie bih bii bik bir bka bkb bke bkk bkr bra brb brd bre brh bri brk brr daa dab dad dae dah dai dak dar dba dbb dbd dbe dbh dbi dbk dbr dda ddb ddd dde ddh ddi ddk ddr de- dea deb ded dee deh dei dek der dh- dha dhb dhd dhe dhh dhi dhk dhr di- dia dib did die dih dii dik dir dka dkb dke dki dkk dkr dra drb drd dre dri drk drr eaa eab ead eae eah eai eak ear eba ebb ebd ebe ebh ebi ebk ebr ed- eda edb edd ede edh edi edk edr eea eeb eed eee eek eer eha ehb ehd ehe ehh ehi ehr eia eib eid eie eii eik eir eka ekb ekd eke ekh eki ekr era erb erd ere erh eri erk err h-i haa hab had hae hah hai hak har hba hbb hbd hbe hbh hbi hbk hbr hda hdb hdd hde hdh hdi hdk hdr he- hea heb hed hee heh hei hek her hha hhb hhd hhe hhh hhi hhk hhr hia hib hid hie hih hii hik hir hka hkb hkd hkh hki hkk hkr hr- hra hrb hrd hre hrh hri hrk hrr i-d ia- iaa iab iad iae iah iai iar iba ibb ibd ibe ibh ibi ibk ibr ida idb idd ide idh idi idk idr ie- iea ied iee iei iek ier iha ihb ihd ihe ihh ihi ihk ihr iia iib iid iie iih iii iir ika ikb ike iki ikk ikr ir- ira irb ird ire iri irk irr ka- kaa kab kad kae kah kai kak kar kba kbb kbd kbe kbh kbi kbk kbr kda kdb kde kdh kdk kdr ke- kea keb ked kee keh kei kek ker kha khe khh khi khk khr kia kib kid kie kih kii kik kir kkb kke kkh kki kkk kkr kra krd kri krk krr ra- raa rab rad rae rah rai rak rar rba rbb rbd rbe rbh rbi rbk rbr rda rdb rdd rde rdh rdi rdr re- rea reb red ree reh rei rek rer rh- rha rhb rhd rhe rhh rhi rhr ria rib rid rie rih rii rik rir rkb rke rkk rra rrb rrd rrh rri rrk rrr