-up b-p b-u bbb bbc bbe bbo bbp bbs bbu bcb bcc bce bco bcp bcs bcu be- beb bec bee beo bep bes beu bob boc boe boo bop bos bou bpb bpc bpe bpo bpp bps bpu bsb bsc bse bso bsp bss bsu bub buc bue buo bup bus buu c-- cbb cbc cbe cbo cbp cbs cbu ccb ccc cce cco ccp ccs ccu ce- ceb cec cee ceo cep ces ceu co- cob coc coe coo cop cos cou cpb cpc cpe cpo cpp cps cpu csb csc cse cso csp css csu cub cuc cue cuo cup cus cuu ebb ebc ebe ebo ebp ebs ebu ec- ecb ecc ece eco ecs ecu eeb eec eee eeo eep ees eo- eob eoc eoe eoo eop eos eou ep- epb epc epe epo epp eps epu es- esb esc ese eso esp ess esu eu- eub euc eue eup eus ob- obb obc obe obo obp obs obu oc- ocb occ oco ocp ocs ocu oeb oec oee oeo oep oes oo- oob ooc ooo oop oos op- opb opc ope opo opp ops os- osb osc ose oso osp oss osu ou- ouc oue ouo oup ous p-p pbb pbc pbe pbo pbp pbs pbu pcb pcc pce pco pcp pcs pcu peb pec pee peo pep pes peu pob poc poe poo pop pos pou ppb ppc ppe ppo ppp pps ppu ps- psb psc pse pso psp pss psu pub puc pue pup pus puu sbb sbc sbe sbo sbp sbs sbu scb scc sce sco scp scs scu se- seb sec see seo sep ses seu sob soc soe soo sop sos sou spb spc spe spo spp sps spu ss- ssb ssc sse sso ssp sss ssu sub suc sue suo sup sus suu ubb ubc ube ubo ubp ubs ubu ucb ucc uce uco ucp ucs ucu ueb uec uee uep ues uob uoc uoe uoo uop uos up- upb upc upe upo upp ups upu usb usc use uso usp uss usu uuc uue uus uuu