-ol b-u bbb bbd bbl bbo bbs bbt bbu bdb bdd bdl bdo bds bdt bdu blb bld bll blo bls blt blu bob bod bol boo bos bot bou bsb bsd bsl bso bss bst bsu btb btd btl bto bts btt btu bub bud bul buo bus but buu dbb dbd dbl dbo dbs dbt dbu ddb ddd ddl ddo dds ddt ddu dl- dlb dld dll dlo dls dlt dlu dob dod dol doo dos dot dou dsb dsd dsl dso dss dst dsu dtb dtd dtl dto dts dtt dtu dub dud dul duo dus dut lbb lbd lbl lbo lbs lbt lbu ldb ldd ldl ldo lds ldt ldu llb lld lll llo lls llt llu lob lod lol loo los lot lou lsb lsd lsl lso lss lst lsu ltb ltd ltl lto lts ltt ltu lub lud lul luo lus lut luu ob- obb obd obl obo obs obt obu odb odd odl odo ods odt odu olb old oll olo ols olt olu oo- oob ood ool ooo oos oot os- osb osd osl oso oss ost osu ot- otb otd otl oto ots ott otu ou- oud oul ouo ous out sbb sbd sbl sbo sbs sbt sbu sdb sdd sdl sdo sds sdt sdu slb sld sll slo sls slt slu sob sod sol soo sos sot sou ss- ssb ssd ssl sso sss sst ssu stb std stl sto sts stt stu sub sud sul suo sus sut suu tbb tbd tbl tbo tbs tbt tbu tdb tdd tdl tdo tds tdt tdu tld tll tlo tls tlt tlu to- tob tod tol too tos tot tou tsb tsd tsl tso tss tst tsu ttb ttd ttl tto tts ttt ttu tub tud tul tuo tus tut tuu ubb ubl ubo ubs ubt ubu udb udd udl udo uds udt udu ulb uld ull ulo uls ult ulu uob uod uol uoo uos uot usb usd usl uso uss ust usu utb utd utl uto uts utt utu uus uut uuu