-al -er a-a a-b a-c aaa aab aac aae aah aak aal aar ab- aba abb abc abe abh abk abl abr ac- aca acb acc ace ach ack acl acr aea aeb aec aee aeh aek ael aer aha ahb ahc ahe ahh ahk ahl ahr aka akb akc ake akh akk akl akr al- ala alb alc ale alh alk all alr ar- ara arb arc are arh ark arl arr baa bab bac bae bah bak bal bar bba bbb bbc bbe bbh bbk bbl bbr bca bcb bcc bce bch bck bcl bcr be- bea beb bec bee beh bek bel ber bha bhb bhc bhe bhh bhk bhl bhr bka bkb bkc bke bkk bkl bkr bla blb blc ble blh blk bll blr bra brb bre brh brk brl brr c-- caa cab cac cae cah cak cal car cba cbb cbc cbe cbh cbk cbl cbr cca ccb ccc cce cch cck ccl ccr ce- cea ceb cec cee ceh cek cel cer ch- cha chb chc che chh chk chl chr cka ckb ckc ckh cl- cla clb clc cle clh clk cll clr cra crb crc cre crh crk crl crr eaa eab eac eae eah eak eal ear eba ebb ebc ebe ebh ebk ebl ebr ec- eca ecb ecc ece ech eck ecl ecr eea eeb eec eee eek eel eer eha ehb ehc ehe ehh ehl ehr eka ekb ekc eke ekh ekl ekr ela elb elc ele elh elk ell elr era erb erc ere erh erk erl err haa hab hac hae hah hak hal har hba hbb hbc hbe hbh hbk hbl hbr hca hcb hcc hce hch hck hcl hcr he- hea heb hec hee heh hek hel her hha hhb hhc hhe hhh hhk hhl hhr hka hkb hkh hkk hkl hkr hla hlb hlc hle hlh hll hlr hr- hra hrb hrc hre hrh hrk hrl hrr ka- kaa kab kac kae kah kak kal kar kba kbb kbc kbe kbh kbk kbl kbr kca kcb kcc kce kch kck kcl kcr ke- kea keb kec kee keh kek kel ker kha khe khh khk khr kkb kkc kke kkh kkk kkl kkr kl- kla klb klc klh klr kra krc krk krl krr la- laa lab lac lae lah lak lal lar lba lbb lbc lbe lbh lbk lbl lbr lca lcb lcc lce lch lck lcl lcr lea leb lec lee leh lek lel ler lha lhb lhc lhh lhk lhr lka lkb lkh lkl lkr lla llb llc lle llk lll llr lra lrb lrc lrh lrk lrr ra- raa rab rac rae rah rak ral rar rba rbb rbc rbe rbh rbk rbl rbr rca rcb rcc rce rch rcl rcr re- rea reb rec ree reh rek rel rer rh- rha rhb rhc rhe rhh rhl rhr rkb rkc rke rkk rla rlc rle rlh rll rlr rra rrb rrc rrh rrk rrl rrr