-al -ol a-a a-b a-c a-t aaa aab aac aal aao aas aat aau ab- aba abb abc abl abo abs abt abu ac- aca acb acc acl aco acs act acu al- ala alb alc all alo als alt alu aoa aob aoc aol aoo aos aot aou as- asa asb asc asl aso ass ast asu at- ata atb atc atl ato ats att atu au- aua aub auc aul auo aus aut b-u baa bab bac bal bao bas bat bau bba bbb bbc bbl bbo bbs bbt bbu bca bcb bcc bcl bco bcs bct bcu bla blb blc bll blo bls blt blu boa bob boc bol boo bos bot bou bsa bsb bsc bsl bso bss bst bsu bta btb btc btl bto bts btt btu bua bub buc bul buo bus but buu c-- caa cab cac cal cao cas cat cau cba cbb cbc cbl cbo cbs cbt cbu cca ccb ccc ccl cco ccs cct ccu cl- cla clb clc cll clo cls clt clu co- coa cob coc col coo cos cot cou csa csb csc csl cso css cst csu cta ctb ctc ctl cto cts ctt ctu cua cub cuc cul cuo cus cut cuu la- laa lab lac lal lao las lat lau lba lbb lbc lbl lbo lbs lbt lbu lca lcb lcc lcl lco lcs lct lcu lla llb llc lll llo lls llt llu loa lob loc lol loo los lot lou lsa lsb lsc lsl lso lss lst lsu lta ltb ltc ltl lto lts ltt ltu lua lub luc lul luo lus lut luu oaa oab oac oal oao oas oat oau ob- oba obb obc obl obo obs obt obu oc- oca ocb occ ocl oco ocs oct ocu ola olb olc oll olo ols olt olu oo- ooa oob ooc ool ooo oos oot os- osa osb osc osl oso oss ost osu ot- ota otb otc otl oto ots ott otu ou- oua ouc oul ouo ous out saa sab sac sal sao sas sat sau sba sbb sbc sbl sbo sbs sbt sbu sca scb scc scl sco scs sct scu sla slb slc sll slo sls slt slu soa sob soc sol soo sos sot sou ss- ssa ssb ssc ssl sso sss sst ssu sta stb stc stl sto sts stt stu sua sub suc sul suo sus sut suu taa tab tac tal tao tas tat tau tba tbb tbc tbl tbo tbs tbt tbu tca tcb tcc tcl tco tcs tct tcu tla tlc tll tlo tls tlt tlu to- toa tob toc tol too tos tot tou tsa tsb tsc tsl tso tss tst tsu tta ttb ttc ttl tto tts ttt ttu tua tub tuc tul tuo tus tut tuu ua- uaa uab uac ual uao uas uat uau uba ubb ubc ubl ubo ubs ubt ubu uca ucb ucc ucl uco ucs uct ucu ula ulb ulc ull ulo uls ult ulu uoa uob uoc uol uoo uos uot usa usb usc usl uso uss ust usu uta utb utc utl uto uts utt utu uua uuc uus uut uuu