-up a-a a-b a-c aaa aab aac aad aao aap aar aau ab- aba abb abc abd abo abp abr abu ac- aca acb acc acd aco acp acr acu ad- ada adb adc add ado adp adr adu aoa aob aoc aod aoo aop aor aou ap- apa apb apc apd apo app apr apu ar- ara arb arc ard aro arp arr aru au- aua aub auc aud auo aup aur b-p b-u baa bab bac bad bao bap bar bau bba bbb bbc bbd bbo bbp bbr bbu bca bcb bcc bcd bco bcp bcr bcu bda bdb bdc bdd bdo bdp bdr bdu boa bob boc bod boo bop bor bou bpa bpb bpc bpd bpo bpp bpr bpu bra brb brd bro brp brr bru bua bub buc bud buo bup bur buu c-- caa cab cac cad cao cap car cau cba cbb cbc cbd cbo cbp cbr cbu cca ccb ccc ccd cco ccp ccr ccu cda cdb cdc cdd cdo cdp cdr cdu co- coa cob coc cod coo cop cor cou cpa cpb cpc cpd cpo cpp cpr cpu cra crb crc crd cro crp crr cru cua cub cuc cud cuo cup cur cuu daa dab dac dad dao dap dar dau dba dbb dbc dbd dbo dbp dbr dbu dca dcb dcc dcd dco dcp dcr dcu dda ddb ddc ddd ddo ddp ddr ddu doa dob doc dod doo dop dor dou dpa dpb dpc dpd dpo dpp dpr dpu dra drb drc drd dro drp drr dru dua dub duc dud duo dup dur oaa oab oac oad oao oap oar oau ob- oba obb obc obd obo obp obr obu oc- oca ocb occ ocd oco ocp ocr ocu oda odb odc odd odo odp odr odu oo- ooa oob ooc ood ooo oop oor op- opa opb opc opd opo opp opr or- ora orb orc ord oro orp orr oru ou- oua ouc oud ouo oup our p-p paa pab pac pad pao pap par pau pba pbb pbc pbd pbo pbp pbr pbu pca pcb pcc pcd pco pcp pcr pcu pda pdb pdc pdd pdo pdp pdr pdu poa pob poc pod poo pop por pou ppa ppb ppc ppd ppo ppp ppr ppu pra prb prc prd pro prp prr pru pua pub puc pud pup pur puu ra- raa rab rac rad rao rap rar rau rba rbb rbc rbd rbo rbp rbr rbu rca rcb rcc rcd rco rcp rcr rcu rda rdb rdc rdd rdo rdp rdr rdu roa rob roc rod roo rop ror rou rpa rpb rpc rpd rpo rpp rpr rpu rra rrb rrc rrd rrp rrr rru rua rub ruc rud ruo rup rur ruu ua- uaa uab uac uad uao uap uar uau uba ubb ubc ubo ubp ubr ubu uca ucb ucc ucd uco ucp ucr ucu uda udb udc udd udo udp udr udu uoa uob uoc uod uoo uop uor up- upa upb upc upd upo upp upr upu ur- ura urb urc urd uro urp urr uru uua uuc uur uuu