-up b-p b-u bbb bbe bbp bbt bbu bbx be- beb bee bep bet beu bex bpb bpe bpp bpt bpu bpx btb bte btp btt btu btx bub bue bup but buu bux bxb bxx ebb ebe ebp ebt ebu ebx eeb eee eep eet eex ep- epb epe epp ept epu epx etb ete etp ett etu etx eu- eub eue eup eut eux ex- exe exp ext exu exx p-p pbb pbe pbp pbt pbu pbx peb pee pep pet peu pex ppb ppe ppp ppt ppu ppx pt- ptb pte ptp ptt ptu ptx pub pue pup put puu pxe pxt t-x tbb tbe tbp tbt tbu te- teb tee tep tet teu tex tpb tpe tpp tpt tpu tpx ttb tte ttp ttt ttu ttx tub tue tup tut tuu tux txe txt txu ubb ube ubp ubt ubu ubx ueb uee uep uet up- upb upe upp upt upu upx utb ute utp utt utu utx uue uut uuu uxb uxt uxu xbe xbx xee xep xet xeu xex xpb xpe xpp xpt xtp xtx xue xup xxp xxx