-er a-a a-b a-c aaa aab aac aae aan aar aaw ab- aba abb abc abe abn abr abw ac- aca acb acc ace acn acr acw aea aeb aec aee aen aer aew an- ana anb anc ane ann anr ar- ara arb arc are arn arr arw aw- awa awb awc awe awn awr aww baa bab bac bae ban bar baw bba bbb bbc bbe bbn bbr bbw bca bcb bcc bce bcn bcr be- bea beb bec bee ben ber bew bna bnb bnc bne bnn bnr bnw bra brb bre brn brr brw bwa bwb bwc bwr c-- caa cab cac cae can car caw cba cbb cbc cbe cbn cbr cbw cca ccb ccc cce ccn ccr ccw ce- cea ceb cec cee cen cer cew cn- cna cnb cnc cne cnn cnr cnw cra crb crc cre crn crr crw cw- cwa cwb cwc cwe cwn cwr eaa eab eac eae ean ear eaw eba ebb ebc ebe ebn ebr ebw ec- eca ecb ecc ece ecn ecr ecw eea eeb eec eee een eer eew en- ena enb enc ene enn enr enw era erb erc ere ern err erw ewa ewb ewc ewe ewr eww naa nab nac nae nan nar naw nba nbb nbc nbe nbn nbr nbw nca ncb ncc nce ncn ncr ncw ne- nea neb nec nee nen ner new nna nnb nnc nne nnn nnw nra nrb nrc nre nrn nrr nrw nwa nwb nwc nwe nwn nwr ra- raa rab rac rae ran rar raw rba rbb rbc rbe rbn rbr rbw rca rcb rcc rce rcn rcr rcw re- rea reb rec ree ren rer rew rna rnb rnc rnn rnr rnw rra rrb rrc rrn rrr rwa rwb rwc rwe rwr waa wab wac wae wan war waw wba wbb wbc wbe wbn wbr wbw wca wcb wcc wce wcn wcr wcw wea web wec wee wen wer wew wn- wna wnc wne wnn wnw wr- wra wrc wre wrn wrr wrw wwa wwc wwe wwn www