-er a-a a-b a-c aaa aab aac aae aag aao aar aaw ab- aba abb abc abe abg abo abr abw ac- aca acb acc ace acg aco acr acw aea aeb aec aee aeg aeo aer aew ag- aga agb agc age agg ago agr agw aoa aob aoc aoe aog aoo aor aow ar- ara arb arc are arg aro arr arw aw- awa awb awc awe awg awo awr aww baa bab bac bae bag bao bar baw bba bbb bbc bbe bbg bbo bbr bbw bca bcb bcc bce bcg bco bcr be- bea beb bec bee beg beo ber bew bga bgb bgc bge bgg bgo bgr bgw boa bob boc boe bog boo bor bow bra brb bre brg bro brr brw bwa bwb bwc bwg bwo bwr c-- caa cab cac cae cag cao car caw cba cbb cbc cbe cbg cbo cbr cbw cca ccb ccc cce ccg cco ccr ccw ce- cea ceb cec cee ceg ceo cer cew cga cgb cgc cge cgg cgo cgr cgw co- coa cob coc coe cog coo cor cow cra crb crc cre crg cro crr crw cw- cwa cwb cwc cwe cwg cwo cwr eaa eab eac eae eag eao ear eaw eba ebb ebc ebe ebg ebo ebr ebw ec- eca ecb ecc ece ecg eco ecr ecw eea eeb eec eee eeg eeo eer eew ega egb egc ege egg ego egr egw eo- eoa eob eoc eoe eog eoo eor eow era erb erc ere erg ero err erw ewa ewb ewc ewe ewo ewr eww gaa gab gac gae gag gao gar gaw gba gbc gbe gbg gbo gbr gbw gca gcb gcc gce gcg gco gcr gcw ge- gea geb gec gee geg geo ger gew gga ggb ggc ggg ggo ggr ggw goa gob goc goe gog goo gor gow gra grb grc gre grg gro grr grw gwa gwb gwc gwe gwg gwr oaa oab oac oae oag oao oar oaw ob- oba obb obc obe obg obo obr obw oc- oca ocb occ ocg oco ocr ocw oea oeb oec oee oeg oeo oer oga ogc oge ogg ogo oo- ooa oob ooc oog ooo oor oow or- ora orb orc ore org oro orr owa owb owc owe owo oww ra- raa rab rac rae rag rao rar raw rba rbb rbc rbe rbg rbo rbr rbw rca rcb rcc rce rcg rco rcr rcw re- rea reb rec ree reg reo rer rew rga rgb rgc rge rgg rgo rgr rgw roa rob roc roe rog roo ror row rra rrb rrc rrg rrr rwa rwb rwc rwe rwr waa wab wac wae wag wao war waw wba wbb wbc wbe wbg wbo wbr wbw wca wcb wcc wce wcg wco wcr wcw wea web wec wee weg weo wer wew wga wgb wgc wgo wgr wgw woa wob woc woe wog woo wor wow wr- wra wrc wre wrg wro wrr wrw wwa wwc wwe wwo www