-er b-u bbb bbe bbh bbk bbo bbr bbu bbx be- beb bee beh bek beo ber beu bex bhb bhe bhh bhj bhk bho bhr bhu bhx bjj bjk bjr bju bkb bke bkk bko bkr bkx bob boe boh boj bok boo bor bou box brb bre brh brj brk bro brr bru brx bub bue buh buj buk buo bur buu bux bxb bxj bxo bxx ebb ebe ebh ebj ebk ebo ebr ebu ebx eeb eee eek eeo eer eex ehb ehe ehh eho ehr ehu ejo eju ekb eke ekh eko ekr eku eo- eob eoe eoh eok eoo eor eou erb ere erh erk ero err eru eu- eub eue euj eur eux ex- exe exh exo exr exu exx hbb hbe hbh hbj hbk hbo hbr hbu hbx he- heb hee heh hej hek heo her heu hex hhb hhe hhh hhj hhk hho hhr hhu hjk hjo hjr hkb hkh hkk hko hkr hku hob hoe hoh hok hoo hor hou hox hr- hrb hre hrh hrj hrk hro hrr hru hub hue huh huj huk huo hur huu hux jbj jbk jbo jbr jbu jeb jee jeh jej jek jeo jer jeu jhe jhj jho jhr jhu jjb jjj jjk jjr jju jkb jkh jkk jko jkr jku jkx job joe joh joj jok joo jor jou jrb jrk jro jrr jub jue juh juk juo jur kbb kbe kbh kbk kbo kbr kbu kbx ke- keb kee keh kek keo ker kex khe khh khj khk kho khr khu kjb kje kjr kju kkb kke kkh kkk kkr kku kob koe koh kok koo kor kou krk kro krr kru kub kue kuh kuj kuk kur kuu kxo ob- obb obe obh obj obk obo obr obu obx oeb oee oeh oeo oer oex ohe ohh oho ohr ohu ojb oje ojo oju okb oke okj okk oko okr oku oo- oob ooh ook ooo oor oox or- orb ore orh ork oro orr oru orx ou- oue ouh ouk ouo our ox- oxb oxo oxx rbb rbe rbh rbk rbo rbr rbu rbx re- reb ree reh rek reo rer reu rex rh- rhb rhe rhh rho rhr rhu rjk rjr rkb rke rkk rko rku rob roe roh roj rok roo ror rou rox rrb rrh rrk rrr rru rub rue ruh ruk ruo rur ruu rux rxr ubb ube ubh ubk ubo ubr ubu ubx ueb uee ueh uer uhb uhe uhh uhj uho uhr uhu ujo ukb uke ukk ukr uku uob uoe uoj uok uoo uor uox ur- urb ure urk uro urr uru urx uue uur uuu uxb uxo uxr uxu xbe xbr xbx xee xer xeu xex xjo xkb xke xok xoo xor xox xrx xue xxo xxx