-al -er a-a a-b a-c aaa aab aac aad aae aal aap aar ab- aba abb abc abd abe abl abp abr ac- aca acb acc acd ace acl acp acr ad- ada adb adc add ade adl adp adr aea aeb aec aed aee ael aep aer al- ala alb alc ald ale all alp alr ap- apa apb apc apd ape apl app apr ar- ara arb arc ard are arl arp arr b-p baa bab bac bad bae bal bap bar bba bbb bbc bbd bbe bbl bbp bbr bca bcb bcc bcd bce bcl bcp bcr bda bdb bdc bdd bde bdl bdp bdr be- bea beb bec bed bee bel bep ber bla blb blc bld ble bll blp blr bpa bpb bpc bpd bpe bpl bpp bpr bra brb brd bre brl brp brr c-- caa cab cac cad cae cal cap car cba cbb cbc cbd cbe cbl cbp cbr cca ccb ccc ccd cce ccl ccp ccr cda cdb cdc cdd cde cdl cdp cdr ce- cea ceb cec ced cee cel cep cer cl- cla clb clc cld cle cll clp clr cpa cpb cpc cpd cpe cpl cpp cpr cra crb crc crd cre crl crp crr daa dab dac dad dae dal dap dar dba dbb dbc dbd dbe dbl dbp dbr dca dcb dcc dcd dce dcl dcp dcr dda ddb ddc ddd dde ddl ddp ddr de- dea deb dec ded dee del dep der dl- dla dlb dlc dld dle dll dlp dlr dpa dpb dpc dpd dpe dpl dpp dpr dra drb drc drd dre drl drp drr eaa eab eac ead eae eal eap ear eba ebb ebc ebd ebe ebl ebp ebr ec- eca ecb ecc ecd ece ecl ecr ed- eda edb edc edd ede edl edp edr eea eeb eec eed eee eel eep eer ela elb elc eld ele ell elp elr ep- epa epb epc epd epe epl epp epr era erb erc erd ere erl erp err l-p la- laa lab lac lad lae lal lap lar lba lbb lbc lbd lbe lbl lbp lbr lca lcb lcc lcd lce lcl lcp lcr lda ldb ldc ldd lde ldl ldp ldr lea leb lec led lee lel lep ler lla llb llc lld lle lll llp llr lpa lpb lpc lpd lpe lpl lpp lpr lra lrb lrc lrd lrp lrr p-p paa pab pac pad pae pal pap par pba pbb pbc pbd pbe pbl pbp pbr pca pcb pcc pcd pce pcl pcp pcr pda pdb pdc pdd pde pdl pdp pdr pea peb pec ped pee pel pep per pla plb plc pld ple pll plp plr ppa ppb ppc ppd ppe ppl ppp ppr pra prb prc prd pre prl prp prr ra- raa rab rac rad rae ral rap rar rba rbb rbc rbd rbe rbl rbp rbr rca rcb rcc rcd rce rcl rcp rcr rda rdb rdc rdd rde rdl rdp rdr re- rea reb rec red ree rel rep rer rla rlc rld rle rll rlp rlr rpa rpb rpc rpd rpe rpl rpp rpr rra rrb rrc rrd rrl rrp rrr