-er a-a a-b aaa aab aae aag aah aaj aao aar ab- aba abb abe abg abh abj abo abr aea aeb aee aeg aeh aej aeo aer ag- aga agb age agg agh agj ago agr aha ahb ahe ahg ahh ahj aho ahr aja ajb aje ajh ajj ajo ajr aoa aob aoe aog aoh aoj aoo aor ar- ara arb are arg arh arj aro arr baa bab bae bag bah baj bao bar bba bbb bbe bbg bbh bbo bbr be- bea beb bee beg beh beo ber bga bgb bge bgg bgh bgo bgr bha bhb bhe bhg bhh bhj bho bhr bja bjg bjj bjr boa bob boe bog boh boj boo bor bra brb bre brg brh brj bro brr eaa eab eae eag eah eaj eao ear eba ebb ebe ebg ebh ebj ebo ebr eea eeb eee eeg eeo eer ega egb ege egg egh ego egr eha ehb ehe ehg ehh eho ehr eja ejo eo- eoa eob eoe eog eoh eoo eor era erb ere erg erh ero err gaa gab gae gag gah gaj gao gar gba gbe gbg gbh gbj gbo gbr ge- gea geb gee geg geh geo ger gga ggb ggg ggh ggj ggo ggr gha ghb ghe ghg ghh ghj gho ghr gja gje gjg gjr goa gob goe gog goh goo gor gra grb gre grg grh grj gro grr haa hab hae hag hah haj hao har hba hbb hbe hbg hbh hbj hbo hbr he- hea heb hee heg heh hej heo her hga hgb hge hgg hgh hgo hgr hha hhb hhe hhg hhh hhj hho hhr hja hjo hjr hoa hob hoe hog hoh hoo hor hr- hra hrb hre hrg hrh hrj hro hrr jaa jab jae jag jah jaj jao jar jba jbg jbj jbo jbr jea jeb jee jeg jeh jej jeo jer jga jgb jge jgh jgo jgr jha jhe jhj jho jhr jja jjb jjg jjj jjr joa job joe jog joh joj joo jor jra jrb jrg jro jrr oaa oab oae oag oah oaj oao oar ob- oba obb obe obg obh obj obo obr oea oeb oee oeg oeh oeo oer oga oge ogg ogh ogo oha ohe ohg ohh oho ohr oja ojb oje ojo oo- ooa oob oog ooh ooo oor or- ora orb ore org orh oro orr ra- raa rab rae rag rah raj rao rar rba rbb rbe rbg rbh rbo rbr re- rea reb ree reg reh reo rer rga rgb rge rgg rgh rgo rgr rh- rha rhb rhe rhg rhh rho rhr rja rjg rjr roa rob roe rog roh roj roo ror rra rrb rrg rrh rrr