-er a-a a-b a-c aaa aab aac aae aar aas aaw ab- aba abb abc abe abr abs abw ac- aca acb acc ace acr acs acw aea aeb aec aee aer aes aew ar- ara arb arc are arr ars arw as- asa asb asc ase asr ass asw aw- awa awb awc awe awr aws aww baa bab bac bae bar bas baw bba bbb bbc bbe bbr bbs bbw bca bcb bcc bce bcr bcs be- bea beb bec bee ber bes bew bra brb bre brr brs brw bsa bsb bsc bse bsr bss bsw bwa bwb bwc bwr bws c-- caa cab cac cae car cas caw cba cbb cbc cbe cbr cbs cbw cca ccb ccc cce ccr ccs ccw ce- cea ceb cec cee cer ces cew cra crb crc cre crr crs crw csa csb csc cse csr css csw cw- cwa cwb cwc cwe cwr cws eaa eab eac eae ear eas eaw eba ebb ebc ebe ebr ebs ebw ec- eca ecb ecc ece ecr ecs ecw eea eeb eec eee eer ees eew era erb erc ere err ers erw es- esa esb esc ese esr ess esw ewa ewb ewc ewe ewr ews eww ra- raa rab rac rae rar ras raw rba rbb rbc rbe rbr rbs rbw rca rcb rcc rce rcr rcs rcw re- rea reb rec ree rer res rew rra rrb rrc rrr rrs rsa rsb rsc rse rsr rss rsw rwa rwb rwc rwe rwr rws saa sab sac sae sar sas saw sba sbb sbc sbe sbr sbs sbw sca scb scc sce scr scs scw se- sea seb sec see ser ses sew sr- sra srb src sre srr srs srw ss- ssa ssb ssc sse ssr sss ssw swa swb swc swe swr sws waa wab wac wae war was waw wba wbb wbc wbe wbr wbs wbw wca wcb wcc wce wcr wcs wcw wea web wec wee wer wes wew wr- wra wrc wre wrr wrs wrw wsa wsb wsc wse wsr wss wsw wwa wwc wwe www