-al -er a-a a-b a-c aaa aab aac aad aae aaf aah aal aar ab- aba abb abc abd abe abf abh abl abr ac- aca acb acc acd ace acf ach acl acr ad- ada adb adc add ade adf adh adl adr aea aeb aec aed aee aef aeh ael aer af- afa afb afc afd afe aff afh afl afr aha ahb ahc ahd ahe ahf ahh ahl ahr al- ala alb alc ald ale alf alh all alr ar- ara arb arc ard are arf arh arl arr baa bab bac bad bae baf bah bal bar bba bbb bbc bbd bbe bbf bbh bbl bbr bca bcb bcc bcd bce bcf bch bcl bcr bda bdb bdc bdd bde bdf bdh bdl bdr be- bea beb bec bed bee bef beh bel ber bfa bfb bfc bfd bfe bff bfh bfl bfr bha bhb bhc bhd bhe bhf bhh bhl bhr bla blb blc bld ble blf blh bll blr bra brb brd bre brf brh brl brr c-- caa cab cac cad cae caf cah cal car cba cbb cbc cbd cbe cbf cbh cbl cbr cca ccb ccc ccd cce ccf cch ccl ccr cda cdb cdc cdd cde cdf cdh cdl cdr ce- cea ceb cec ced cee cef ceh cel cer cfa cfb cfc cfd cfe cff cfh cfl cfr ch- cha chb chc chd che chf chh chl chr cl- cla clb clc cld cle clf clh cll clr cra crb crc crd cre crf crh crl crr daa dab dac dad dae daf dah dal dar dba dbb dbc dbd dbe dbf dbh dbl dbr dca dcb dcc dcd dce dcf dcl dcr dda ddb ddc ddd dde ddf ddh ddl ddr de- dea deb dec ded dee def deh del der dfa dfb dfc dfd dfe dff dfh dfl dfr dh- dha dhb dhc dhd dhe dhf dhh dhl dhr dl- dla dlb dlc dld dle dlf dlh dll dlr dra drb drc drd dre drl drr eaa eab eac ead eae eaf eah eal ear eba ebb ebc ebd ebe ebf ebh ebl ebr ec- eca ecb ecc ecd ece ecf ech ecl ecr ed- eda edb edc edd ede edf edh edl edr eea eeb eec eed eee eef eel eer ef- efa efb efc efd efe eff efh efl efr eha ehb ehc ehd ehe ehf ehh ehl ehr ela elb elc eld ele elf elh ell elr era erb erc erd ere erf erh erl err faa fab fac fad fae faf fah fal far fba fbb fbc fbd fbe fbf fbh fbl fbr fca fcb fcc fcd fce fcf fcl fcr fda fdb fdc fdd fde fdf fdh fdl fdr fea feb fec fed fee fef feh fel fer ffa ffc ffd ffe fff ffh ffl ffr fha fhb fhc fhe fhf fhh fhl fhr fla flb flc fld fle flf fll flr fra frb frc frd fre frf frh frl frr haa hab hac had hae haf hah hal har hba hbb hbc hbd hbe hbf hbh hbl hbr hca hcb hcc hcd hce hcf hch hcl hcr hda hdb hdc hdd hde hdf hdh hdl hdr he- hea heb hec hed hee hef heh hel her hfa hfb hfc hfd hfe hff hfh hfl hfr hha hhb hhc hhd hhe hhf hhh hhl hhr hla hlb hlc hld hle hlf hlh hll hlr hr- hra hrb hrc hrd hre hrf hrh hrl hrr la- laa lab lac lad lae laf lah lal lar lba lbb lbc lbd lbe lbf lbh lbl lbr lca lcb lcc lcd lce lcf lch lcl lcr lda ldb ldc ldd lde ldf ldh ldl ldr lea leb lec led lee lef leh lel ler lfa lfb lfc lfd lfe lff lfh lfl lfr lha lhb lhc lhd lhf lhh lhr lla llb llc lld lle llf lll llr lra lrb lrc lrd lrf lrh lrr ra- raa rab rac rad rae raf rah ral rar rba rbb rbc rbd rbe rbf rbh rbl rbr rca rcb rcc rcd rce rcf rch rcl rcr rda rdb rdc rdd rde rdf rdh rdl rdr re- rea reb rec red ree ref reh rel rer rfa rfb rfc rfd rfe rff rfh rfl rfr rh- rha rhb rhc rhd rhe rhf rhh rhl rhr rla rlc rld rle rlf rlh rll rlr rra rrb rrc rrd rrf rrh rrl rrr