-er a-a a-b aaa aab aad aae aah aak aar ab- aba abb abd abe abh abk abr ad- ada adb add ade adh adk adr aea aeb aed aee aeh aek aer aha ahb ahd ahe ahh ahk ahr aka akb akd ake akh akk akr ar- ara arb ard are arh ark arr baa bab bad bae bah bak bar bba bbb bbd bbe bbh bbk bbr bda bdb bdd bde bdh bdk bdr be- bea beb bed bee beh bek ber bha bhb bhd bhe bhh bhk bhr bka bkb bke bkk bkr bra brb brd bre brh brk brr daa dab dad dae dah dak dar dba dbb dbd dbe dbh dbk dbr dda ddb ddd dde ddh ddk ddr de- dea deb ded dee deh dek der dh- dha dhb dhd dhe dhh dhk dhr dka dkb dke dkk dkr dra drb drd dre drk drr eaa eab ead eae eah eak ear eba ebb ebd ebe ebh ebk ebr ed- eda edb edd ede edh edk edr eea eeb eed eee eek eer eha ehb ehd ehe ehh ehr eka ekb ekd eke ekh ekr era erb erd ere erh erk err haa hab had hae hah hak har hba hbb hbd hbe hbh hbk hbr hda hdb hdd hde hdh hdk hdr he- hea heb hed hee heh hek her hha hhb hhd hhe hhh hhk hhr hka hkb hkd hkh hkk hkr hr- hra hrb hrd hre hrh hrk hrr ka- kaa kab kad kae kah kak kar kba kbb kbd kbe kbh kbk kbr kda kdb kde kdh kdk kdr ke- kea keb ked kee keh kek ker kha khe khh khk khr kkb kke kkh kkk kkr kra krd krk krr ra- raa rab rad rae rah rak rar rba rbb rbd rbe rbh rbk rbr rda rdb rdd rde rdh rdr re- rea reb red ree reh rek rer rh- rha rhb rhd rhe rhh rhr rkb rke rkk rra rrb rrd rrh rrk rrr