-er a-a a-b aaa aab aad aae aaj aao aar ab- aba abb abd abe abj abo abr ad- ada adb add ade adj ado adr aea aeb aed aee aej aeo aer aja ajb ajd aje ajj ajo ajr aoa aob aod aoe aoj aoo aor ar- ara arb ard are arj aro arr baa bab bad bae baj bao bar bba bbb bbd bbe bbo bbr bda bdb bdd bde bdj bdo bdr be- bea beb bed bee beo ber bja bjd bjj bjr boa bob bod boe boj boo bor bra brb brd bre brj bro brr daa dab dad dae daj dao dar dba dbb dbd dbe dbo dbr dda ddb ddd dde ddo ddr de- dea deb ded dee dej deo der dj- dja djb djd dje djo doa dob dod doe doj doo dor dra drb drd dre drj dro drr eaa eab ead eae eaj eao ear eba ebb ebd ebe ebj ebo ebr ed- eda edb edd ede edj edo edr eea eeb eed eee eeo eer eja ejd ejo eo- eoa eob eod eoe eoo eor era erb erd ere ero err j-d jaa jab jad jae jaj jao jar jba jbj jbo jbr jda jdb jde jdo jdr jea jeb jed jee jej jeo jer jja jjb jjj jjr joa job jod joe joj joo jor jra jrb jro jrr oaa oab oad oae oaj oao oar ob- oba obb obd obe obj obo obr oda odb odd ode odo odr oea oeb oed oee oeo oer oja ojb ojd oje ojo oo- ooa oob ood ooo oor or- ora orb ord ore oro orr ra- raa rab rad rae raj rao rar rba rbb rbd rbe rbo rbr rda rdb rdd rde rdj rdo rdr re- rea reb red ree reo rer rja rjr roa rob rod roe roj roo ror rra rrb rrd rrr