-er a-a a-b aaa aab aae aah aak aar aau ab- aba abb abe abh abk abr abu aea aeb aee aeh aek aer aeu aha ahb ahe ahh ahk ahr ahu aka akb ake akh akk akr aku ar- ara arb are arh ark arr aru au- aua aub aue auh auk aur b-u baa bab bae bah bak bar bau bba bbb bbe bbh bbk bbr bbu be- bea beb bee beh bek ber beu bha bhb bhe bhh bhk bhr bhu bka bkb bke bkk bkr bra brb bre brh brk brr bru bua bub bue buh buk bur buu eaa eab eae eah eak ear eau eba ebb ebe ebh ebk ebr ebu eea eeb eee eek eer eha ehb ehe ehh ehr ehu eka ekb eke ekh ekr eku era erb ere erh erk err eru eu- eua eub eue eur haa hab hae hah hak har hau hba hbb hbe hbh hbk hbr hbu he- hea heb hee heh hek her heu hha hhb hhe hhh hhk hhr hhu hka hkb hkh hkk hkr hku hr- hra hrb hre hrh hrk hrr hru hua hub hue huh huk hur huu ka- kaa kab kae kah kak kar kau kba kbb kbe kbh kbk kbr kbu ke- kea keb kee keh kek ker kha khe khh khk khr khu kkb kke kkh kkk kkr kku kra krk krr kru kub kue kuh kuk kur kuu ra- raa rab rae rah rak rar rau rba rbb rbe rbh rbk rbr rbu re- rea reb ree reh rek rer reu rh- rha rhb rhe rhh rhr rhu rkb rke rkk rku rra rrb rrh rrk rrr rru rua rub rue ruh ruk rur ruu ua- uaa uab uae uah uak uar uau uba ubb ube ubh ubk ubr ubu uea ueb uee ueh uer uha uhb uhe uhh uhr uhu uka ukb uke ukk ukr uku ur- ura urb ure urk urr uru uua uue uur uuu