-er a-a a-b aaa aab aae aah aak aar aav ab- aba abb abe abh abk abr abv aea aeb aee aeh aek aer aev aha ahb ahe ahh ahk ahr ahv aka akb ake akh akk akr akv ar- ara arb are arh ark arr arv av- ava avb ave avh avk avr baa bab bae bah bak bar bav bba bbb bbe bbh bbk bbr be- bea beb bee beh bek ber bev bha bhb bhe bhh bhk bhr bhv bka bkb bke bkk bkr bkv bra brb bre brh brk brr brv bva bvb bve bvh bvk bvr bvv eaa eab eae eah eak ear eav eba ebb ebe ebh ebk ebr ebv eea eeb eee eek eer eev eha ehb ehe ehh ehr ehv eka ekb eke ekh ekr ekv era erb ere erh erk err erv eva evb eve evh evr evv haa hab hae hah hak har hav hba hbb hbe hbh hbk hbr hbv he- hea heb hee heh hek her hev hha hhb hhe hhh hhk hhr hhv hka hkb hkh hkk hkr hr- hra hrb hre hrh hrk hrr hrv hv- hva hvb hvk hvr hvv ka- kaa kab kae kah kak kar kav kba kbb kbe kbh kbk kbr ke- kea keb kee keh kek ker kev kha khe khh khk khr khv kkb kke kkh kkk kkr kkv kra krk krr krv kva kvb kvh kvk kvr kvv ra- raa rab rae rah rak rar rav rba rbb rbe rbh rbk rbr re- rea reb ree reh rek rer rev rh- rha rhb rhe rhh rhr rhv rkb rke rkk rkv rra rrb rrh rrk rrr rva rvb rve rvh rvr rvv v-a v-e vaa vab vae vah vak var vav vba vbh vbk vbr vbv vea veb vee veh vek ver vh- vha vhb vhe vka vkb vra vrb vre vrh vrk vrr vva vvb vvr vvv