-er a-a a-b aaa aab aae aaf aao aar aav aax ab- aba abb abe abf abo abr abv abx aea aeb aee aef aeo aer aev aex af- afa afb afe aff afo afr afv afx aoa aob aoe aof aoo aor aov aox ar- ara arb are arf aro arr arv arx av- ava avb ave avf avo avr avx ax- axa axe axo axr axv axx baa bab bae baf bao bar bav bax bba bbb bbe bbf bbo bbr bbx be- bea beb bee bef beo ber bev bex bfa bfb bfe bff bfo bfr bfv bfx boa bob boe bof boo bor bov box bra brb bre brf bro brr brv brx bva bvb bve bvo bvr bvv bxb bxo bxx eaa eab eae eaf eao ear eav eax eba ebb ebe ebf ebo ebr ebv ebx eea eeb eee eef eeo eer eev eex ef- efa efb efe eff efo efr efx eo- eoa eob eoe eof eoo eor era erb ere erf ero err erv eva evb eve evf evo evr evv ex- exa exe exo exr exx faa fab fae faf fao far fav fax fba fbb fbe fbf fbo fbr fbx fea feb fee fef feo fer fev fex ffa ffe fff ffo ffr ffv ffx foa fob foe fof foo for fox fra frb fre frf fro frr fva fxe fxr fxx oaa oab oae oaf oao oar oav oax ob- oba obb obe obf obo obr obv obx oea oeb oee oef oeo oer oex of- ofa ofb ofe off ofo ofr ofv ofx oo- ooa oob oof ooo oor oov oox or- ora orb ore orf oro orr orv orx ov- ova ovb ove ovf ovo ovv ox- oxa oxb oxf oxo oxx ra- raa rab rae raf rao rar rav rax rba rbb rbe rbf rbo rbr rbx re- rea reb ree ref reo rer rev rex rfa rfb rfe rff rfo rfr rfv roa rob roe rof roo ror rov rox rra rrb rrf rrr rva rvb rve rvf rvo rvr rvv rxr v-a v-e vaa vab vae vao var vav vax vba vbo vbr vbv vea veb vee vef veo ver vex vfa vfb vff vfr vfv voa vob voe vof voo vor vov vox vra vrb vre vrf vrr vva vvb vvo vvr vvv vxa vxr vxv xaa xaf xar xav xbe xbr xbx xee xer xev xex xfa xfe xfv xfx xoa xof xoo xor xov xox xrf xrx xxo xxv xxx

a-be aaaa aaab aaae aaaf aaar aaav aaba aabb aaea aaev aafa aafb aaff aaoe aaoo aara aare aaro aava abaa abab abae abaf abar abax abb- abba abbb abbe abbo abbr abee aber abff aboa abob abof aboo abor abov abox abra abro abva aeaf aeer aer- aera aero aeva afaa afao afar afee afer affa affo afoa afoe afoo afor afox afr- afra afre afro afxe aoba aora aorb arab arae araf arar arax arba arbe area aree aref areo arev arex arfa arfb arff aroa arob aroe aroo aror arr- arra arre arro arrr arva arve arvo avab avao avar avax avea aveo aver avex avor avra avre avro avva avvo axaf axar axer axfr axo- axoa axof axxo ba-x baaa baaf baar baba babb babe babo babr baer baff bafo bar- bara barb bare barf baro barr barx bava bave bbbb bbeb bbox beaf bear beav beba bebb bebe bebo beeb beef beer befa befe beff befo beo- beof beor bera bere bero berr bevo boab boar boba bobb bobe bobo boea boee boef boeo boer bofa bofe boff boob booe boof boor boox bor- bora bore borf boro borr bova bove bovo boxa brab brae braf brao brav brax brea breb bree bref breo brer brev brex broa brob broe broo bror brox brrr eaaf eaba eafb eara earb eare earo eave ebba ebbo ebbr eber eboe eboo ebor ebox ebro eeea eeee eefa eefe eera eero eeva efab efax efbr efeo effa efor eora eore er-x eraf erba erbb erbe ereb erer erev erfx erob eroe eroo erra erre erro erve evae evar evea ever evex evoe evoo evra evre exa- exer exfo exo- exor exrx faaa faba fabe fabo faeb faex fafa fafe faff fafo fara farb fare faro farr fava fave faxe fbar feaf fear feba febo feeb feer fefe feff fefo feof fera ferb fere fero ferr ferv feve fevr ffar ffee ffff ffrr foaf foar foba foer fofo foof for- fora forb fore foro forr fove foxe foxx fr-v frab frae frax frea free freo frex frob froe o-eo oaer oafo oara oare obba obbo obea ober obex obfv oboe obor obox obra obre obro oeax oera oere ofer off- offa offe offo offr ofor ofra ofre ooaa ooba oobe ooer ooff oooo oora oore orab orae orao orar orav orba orbb orbe orbo ore- orea oreb oreo orer orex orfe orff oro- oroe orof oror orra orro orve orvr ovar ovee over ovo- ovoo ovra ovre oxa- oxea oxer oxo- oxof oxox oxxo raab raaf raba rabb rabe rabo raef raer rafa rafe raff raob rara rarb rare rarf raro rava rave raxa rbaf rbbb rbbr rea- reae reaf reao rear reba rebb rebe rebo reeb reef reev refe reff refr reof rera rere rero reva reve revo rexx rfae rfef roab roaf roar rob- roba robb robe robo roea roer roev rofe roff rofo roob roof roor roox rora rore roro rova rove rovo roxa roxo rrrr rver vaar vafa vara vare varf varr vava vear veba veer vefa veor ver- vera verb vere vero veve vevo vexx vfax vfor voar voer voff vofr voor vor- vora vore voro voxx vrav vrba vref vreo vver vvob vvvv xaar xara xare xbar xbee xbox xbra xeer xefe xer- xera xero xexe xfer xoro xove xoxo xvfb xxxo xxxv xxxx

-aaa- a-box aaaee aabaa aabba aabra aaeaf abaab ababa ababe abaer abara abare abava abave abbar abear abeba abebe abeer abera