-al -er a-a a-b aaa aab aae aal aap aar ab- aba abb abe abl abp abr aea aeb aee ael aep aer al- ala alb ale all alp alr ap- apa apb ape apl app apr ar- ara arb are arl arp arr b-p baa bab bae bal bap bar bba bbb bbe bbl bbp bbr be- bea beb bee bel bep ber bla blb ble bll blp blr bpa bpb bpe bpl bpp bpr bra brb bre brl brp brr eaa eab eae eal eap ear eba ebb ebe ebl ebp ebr eea eeb eee eel eep eer ela elb ele ell elp elr ep- epa epb epe epl epp epr era erb ere erl erp err l-p la- laa lab lae lal lap lar lba lbb lbe lbl lbp lbr lea leb lee lel lep ler lla llb lle lll llp llr lpa lpb lpe lpl lpp lpr lra lrb lrp lrr p-p paa pab pae pal pap par pba pbb pbe pbl pbp pbr pea peb pee pel pep per pla plb ple pll plp plr ppa ppb ppe ppl ppp ppr pra prb pre prl prp prr ra- raa rab rae ral rap rar rba rbb rbe rbl rbp rbr re- rea reb ree rel rep rer rla rle rll rlp rlr rpa rpb rpe rpl rpp rpr rra rrb rrl rrp rrr