-er a-a a-b aaa aab aae aaj aan aao aar ab- aba abb abe abj abn abo abr aea aeb aee aej aen aeo aer aja ajb aje ajj ajn ajo ajr an- ana anb ane anj ann ano anr aoa aob aoe aoj aon aoo aor ar- ara arb are arj arn aro arr baa bab bae baj ban bao bar bba bbb bbe bbn bbo bbr be- bea beb bee ben beo ber bja bjj bjn bjr bna bnb bne bnj bnn bno bnr boa bob boe boj bon boo bor bra brb bre brj brn bro brr eaa eab eae eaj ean eao ear eba ebb ebe ebj ebn ebo ebr eea eeb eee een eeo eer eja ejo en- ena enb ene enn eno enr eo- eoa eob eoe eon eoo eor era erb ere ern ero err jaa jab jae jaj jan jao jar jba jbj jbo jbr jea jeb jee jej jen jeo jer jja jjb jjj jjr jna jne jnj jnn jno jnr joa job joe joj jon joo jor jra jrb jrn jro jrr naa nab nae naj nan nao nar nba nbb nbe nbn nbo nbr ne- nea neb nee nej nen neo ner nja nje njn nna nnb nne nnn nno no- noa nob noe noj non noo nor nra nrb nre nrj nrn nro nrr oaa oab oae oaj oan oao oar ob- oba obb obe obj obn obo obr oea oeb oee oen oeo oer oja ojb oje ojo on- ona onb one onj onn ono onr oo- ooa oob oon ooo oor or- ora orb ore orn oro orr ra- raa rab rae raj ran rao rar rba rbb rbe rbn rbo rbr re- rea reb ree ren reo rer rja rjr rna rnb rnn rno rnr roa rob roe roj ron roo ror rra rrb rrn rrr