-up b-p b-u bbb bbl bbp bbs bbu blb bll blp bls blu bpb bpl bpp bps bpu bsb bsl bsp bss bsu bub bul bup bus buu l-p lbb lbl lbp lbs lbu llb lll llp lls llu lpb lpl lpp lps lpu lsb lsl lsp lss lsu lub lul lup lus luu p-p pbb pbl pbp pbs pbu plb pll plp pls plu ppb ppl ppp pps ppu ps- psb psl psp pss psu pub pul pup pus puu sbb sbl sbp sbs sbu slb sll slp sls slu spb spl spp sps spu ss- ssb ssl ssp sss ssu sub sul sup sus suu ubb ubl ubp ubs ubu ulb ull ulp uls ulu up- upb upp ups upu usb usl usp uss usu uus uuu