-al a-a a-b aaa aab aal aap aar aax ab- aba abb abl abp abr abx al- ala alb all alp alr alx ap- apa apb apl app apr apx ar- ara arb arl arp arr arx ax- axa axl axp axr axx b-p baa bab bal bap bar bax bba bbb bbl bbp bbr bbx bla blb bll blp blr blx bpa bpb bpl bpp bpr bpx bra brb brl brp brr brx bxb bxl bxx l-p la- laa lab lal lap lar lax lba lbb lbl lbp lbr lbx lla llb lll llp llr lpa lpb lpl lpp lpr lpx lra lrb lrp lrr lxr lxx p-p paa pab pal pap par pax pba pbb pbl pbp pbr pbx pla plb pll plp plr plx ppa ppb ppl ppp ppr ppx pra prb prl prp prr prx pxl pxr ra- raa rab ral rap rar rax rba rbb rbl rbp rbr rbx rla rll rlp rlr rpa rpb rpl rpp rpr rpx rra rrb rrl rrp rrr rxp rxr xaa xal xap xar xbl xbr xbx xla xlb xlr xpa xpb xpl xpp xrx xxl xxp xxx