-er -ey a-a a-b a-c aaa aab aac aae aap aar aas aay ab- aba abb abc abe abp abr abs aby ac- aca acb acc ace acp acr acs acy aea aeb aec aee aep aer aes aey ap- apa apb apc ape app apr aps apy ar- ara arb arc are arp arr ars ary as- asa asb asc ase asp asr ass asy ay- aya ayc aye ayp ayr ays b-p baa bab bac bae bap bar bas bay bba bbb bbc bbe bbp bbr bbs bby bca bcb bcc bce bcp bcr bcs bcy be- bea beb bec bee bep ber bes bey bpa bpb bpc bpe bpp bpr bps bpy bra brb bre brp brr brs bry bsa bsb bsc bse bsp bsr bss bsy by- bya byc bye byp byr bys c-- caa cab cac cae cap car cas cay cba cbb cbc cbe cbp cbr cbs cby cca ccb ccc cce ccp ccr ccs ce- cea ceb cec cee cep cer ces cey cpa cpb cpc cpe cpp cpr cps cra crb crc cre crp crr crs cry csa csb csc cse csp csr css csy cya cyb cyc cye cyp cyr cys eaa eab eac eae eap ear eas eba ebb ebc ebe ebp ebr ebs eby ec- eca ecb ecc ece ecr ecs eea eeb eec eee eep eer ees eey ep- epa epb epc epe epp epr eps era erb erc ere erp err ers ery es- esa esb esc ese esp esr ess esy eya eyc eye eyp eyr eys p-p paa pab pac pae pap par pas pay pba pbb pbc pbe pbp pbr pbs pby pca pcb pcc pce pcp pcr pcs pea peb pec pee pep per pes pey ppa ppb ppc ppe ppp ppr pps pra prb prc pre prp prr prs pry ps- psa psb psc pse psp psr pss psy py- pya pyb pyc pye pyr pys ra- raa rab rac rae rap rar ras ray rba rbb rbc rbe rbp rbr rbs rca rcb rcc rce rcp rcr rcs re- rea reb rec ree rep rer res rey rpa rpb rpc rpe rpp rpr rps rra rrb rrc rrp rrr rrs rsa rsb rsc rse rsp rsr rss ry- rya ryc rye ryr rys ryy saa sab sac sae sap sar sas say sba sbb sbc sbe sbp sbr sbs sby sca scb scc sce scp scr scs se- sea seb sec see sep ser ses sey spa spb spc spe spp spr sps spy sr- sra srb src sre srp srr srs sry ss- ssa ssb ssc sse ssp ssr sss sy- sya syb syc sye syp syr sys yaa yab yac yae yap yar yas yay ybc ybe ybp ybr ybs yby yca ycc yce ycp ycs ycy yea yeb yec yee yep yer yes yey ypa yps yra yrc yre yrp yrs ysa ysb ysc yse ysp ysr yss ysy yyb yyc yye yys yyy