-er -up a-a a-b a-c aaa aab aac aae aam aap aar aau ab- aba abb abc abe abm abp abr abu ac- aca acb acc ace acm acp acr acu aea aeb aec aee aem aep aer aeu ama amb amc ame amm amp amr amu ap- apa apb apc ape apm app apr apu ar- ara arb arc are arm arp arr aru au- aua aub auc aue aum aup aur b-p b-u baa bab bac bae bam bap bar bau bba bbb bbc bbe bbm bbp bbr bbu bca bcb bcc bce bcm bcp bcr bcu be- bea beb bec bee bem bep ber beu bma bmb bmc bme bmm bmp bmr bmu bpa bpb bpc bpe bpm bpp bpr bpu bra brb bre brm brp brr bru bua bub buc bue bum bup bur buu c-- caa cab cac cae cam cap car cau cba cbb cbc cbe cbm cbp cbr cbu cca ccb ccc cce ccm ccp ccr ccu ce- cea ceb cec cee cem cep cer ceu cma cmb cmc cme cmm cmp cmr cmu cpa cpb cpc cpe cpm cpp cpr cpu cra crb crc cre crm crp crr cru cua cub cuc cue cum cup cur cuu eaa eab eac eae eam eap ear eau eba ebb ebc ebe ebm ebp ebr ebu ec- eca ecb ecc ece ecm ecr ecu eea eeb eec eee eem eep eer em- ema emb emc eme emm emp emr emu ep- epa epb epc epe epm epp epr epu era erb erc ere erm erp err eru eu- eua eub euc eue eup eur m-r maa mab mac mae mam map mar mau mba mbb mbc mbe mbm mbp mbr mbu mc- mca mcb mcc mce mcm mcp mcr mcu mea meb mec mee mem mep mer meu mma mmb mmc mme mmm mmp mmr mmu mpa mpb mpc mpe mpm mpp mpr mpu mra mrb mrc mre mrm mrp mrr mru mua mub muc mue mum mup mur muu p-p paa pab pac pae pam pap par pau pba pbb pbc pbe pbm pbp pbr pbu pca pcb pcc pce pcm pcp pcr pcu pea peb pec pee pem pep per peu pma pmb pmc pme pmm pmp pmr pmu ppa ppb ppc ppe ppm ppp ppr ppu pra prb prc pre prm prp prr pru pua pub puc pue pum pup pur puu ra- raa rab rac rae ram rap rar rau rba rbb rbc rbe rbm rbp rbr rbu rca rcb rcc rce rcm rcp rcr rcu re- rea reb rec ree rem rep rer reu rma rmb rmc rme rmm rmp rmr rpa rpb rpc rpe rpm rpp rpr rpu rra rrb rrc rrm rrp rrr rru rua rub ruc rue rum rup rur ruu ua- uaa uab uac uae uam uap uar uau uba ubb ubc ube ubp ubr ubu uca ucb ucc uce ucm ucp ucr ucu uea ueb uec uee uem uep uer um- uma umb umc ume umm ump umr umu up- upa upb upc upe upm upp upr upu ur- ura urb urc ure urm urp urr uru uua uuc uue uum uur uuu