-al -ol a-a a-b a-c aaa aab aac aae aal aao aas aau ab- aba abb abc abe abl abo abs abu ac- aca acb acc ace acl aco acs acu aea aeb aec aee ael aeo aes aeu al- ala alb alc ale all alo als alu aoa aob aoc aoe aol aoo aos aou as- asa asb asc ase asl aso ass asu au- aua aub auc aue aul auo aus b-u baa bab bac bae bal bao bas bau bba bbb bbc bbe bbl bbo bbs bbu bca bcb bcc bce bcl bco bcs bcu be- bea beb bec bee bel beo bes beu bla blb blc ble bll blo bls blu boa bob boc boe bol boo bos bou bsa bsb bsc bse bsl bso bss bsu bua bub buc bue bul buo bus buu c-- caa cab cac cae cal cao cas cau cba cbb cbc cbe cbl cbo cbs cbu cca ccb ccc cce ccl cco ccs ccu ce- cea ceb cec cee cel ceo ces ceu cl- cla clb clc cle cll clo cls clu co- coa cob coc coe col coo cos cou csa csb csc cse csl cso css csu cua cub cuc cue cul cuo cus cuu eaa eab eac eae eal eao eas eau eba ebb ebc ebe ebl ebo ebs ebu ec- eca ecb ecc ece ecl eco ecs ecu eea eeb eec eee eel eeo ees ela elb elc ele ell elo els elu eo- eoa eob eoc eoe eol eoo eos eou es- esa esb esc ese esl eso ess esu eu- eua eub euc eue eul eus la- laa lab lac lae lal lao las lau lba lbb lbc lbe lbl lbo lbs lbu lca lcb lcc lce lcl lco lcs lcu lea leb lec lee lel leo les leu lla llb llc lle lll llo lls llu loa lob loc loe lol loo los lou lsa lsb lsc lse lsl lso lss lsu lua lub luc lue lul luo lus luu oaa oab oac oae oal oao oas oau ob- oba obb obc obe obl obo obs obu oc- oca ocb occ ocl oco ocs ocu oea oeb oec oee oel oeo oes ola olb olc ole oll olo ols olu oo- ooa oob ooc ool ooo oos os- osa osb osc ose osl oso oss osu ou- oua ouc oue oul ouo ous saa sab sac sae sal sao sas sau sba sbb sbc sbe sbl sbo sbs sbu sca scb scc sce scl sco scs scu se- sea seb sec see sel seo ses seu sla slb slc sle sll slo sls slu soa sob soc soe sol soo sos sou ss- ssa ssb ssc sse ssl sso sss ssu sua sub suc sue sul suo sus suu ua- uaa uab uac uae ual uao uas uau uba ubb ubc ube ubl ubo ubs ubu uca ucb ucc uce ucl uco ucs ucu uea ueb uec uee uel ues ula ulb ulc ule ull ulo uls ulu uoa uob uoc uoe uol uoo uos usa usb usc use usl uso uss usu uua uuc uue uus uuu