a-ii aaaa aaab aaac aaai aaal aaap aaba aabb aabc aabi aabl aabp aaca aacb aacc aaci aacl aaco aacp aaib aaic aaii aala aalc aali aall aalo aaoo aapa aapc aapi aapl aapo abaa abab abac abai abal abap abb- abba abbb abbi abbo abca abcb abcc abci abcl abcp abia abib abic abil abla ablo aboa abob abol aboo abpa abpc abpi abpp acaa acab acac acai acap acba acbl acca accc acci acco accp aci- acia acic acip acla aclc acli acoa acol acop acpa acpi aiai aiba aibl aibo aica aicc aicp aiia aiib aiic aila aili aioc aioi aipa aipi al-p alaa alac alai alal alao alap alb- alba albc albi albo alca alcc alco ali- alia alib alii alil alio alip all- alla alli alll allo aloa aloc aloi alol aloo alop alpa alpi alpl alpo aoba aoca aola aopo apac apai apal apao apap apba apca apcb apcc apco api- apia apic apio apip apl- apla aplp apo- apoc apoo apop appa appc appl ba-i baaa baal baba babb babi babo bac- baca bacc baci baco baia baib baic bail baio bala balc bali ball balo baol bapa bapc bapi bapp bbbb bbci bblb bcaa bcap bcbc bcbp bcca bccc bcci bccl bcia bcpl bcpp bial biao biap biba bibb bibi bibl bibo bica bicc bici bico bila bili bill bilo bio- bioc bioi biol bipa bipp blaa blab blac blic blio blip blob bloc bloo blop boab boac boai boal boba bobb bobi bobo boca boco boi- boii boil bola boli boll bolo boob booc bool boop bopa bopp bpai bpcp c-bo caaa caab caac caal caap caba cabi cabo cac- caca cacc caci caco caia caib caic cail caio caip cala calc cali call calo calp caoi caol capa capb capc capi capo capp cbac cbal cbbc cbca cbcc cbcl cbcp cbia cblb cblc cbol cbpc cbpp ccaa ccab ccac ccai ccap ccba ccbc ccca cccb cccc ccci cccl cccp ccic ccii ccil ccip ccla cclc ccli ccob ccoc ccpa ccpl ccpp ciaa cial ciao ciba cibc cibi cibo cica cicc cici cico ciia ciii cila cili cill cilo cilp ciob cipa cipo cipp clab clai clap clib clic clii clio clip clob cloo clop clpb clpp coai coal coba cobb cobi cobo coca coco cocp coia coil coip col- cola colb coli coll colo colp coob cool coop copa copi copo copp cpaa cpac cpap cpbc cpca cpia cpic cpio cplc cppa iaaa iaac iaai iaal iaap iaba iaca iacc iacp iaia iala iall iapa iapp ibac ibca ibia icaa icab icac icai ical icao icap icbc icbp icca iccb iccc icci iccl icco iccp icll iclp icoc icpa icpc icpo iiac iica iiii iiio iila iioi iioo iiop iipa ilac ilal ilbc ilca ilia ilic ilio ill- illa illi illo illp iloc iloo ilpa ioba iobi ioci iocp ioii ioio iola iolo iooi iooo iopl ipac ipba ipca ipcc ipil iplo ipop ippa ippc ippo laaa laac laal laap laba labi labo laca lacc laci lacl laco lacp laia laic lail laip lala lali lall lalo lapa lapb lapc lapi lapp lbcc lbia lcac lcbc lcca lccc lcia lcpa lcpc lcpl liac liao liba libc libo lica lico liia liii lila lilb lili lill lilo lio- lip- lipa lipb lipc lipi lipl lipo lipp llao llcc lllc llll lloa lloc lloo loac loap lob- loba lobb lobi lobo loca locc loci loco loic lola loli loll lolo loob looc lool loop lopa lopi lopp lpac lpla lppl oaic oall oapi obai obal obba obbo obia obla oboi obol ocab ocac ocal ocap ocbc occa occc occi oclc ocpa ocpp oiba oici oiii oila oipc olac olba olbo olca olcc olia olib olic olio olla olli ollo olpc ooaa ooba oobi ooia oola oolo oooo opal opap opca opia opic opii opio opla opo- oppa oppi oppo paal paap paba paca paci paco paia paib pail paio paip pala pali pall palo palp paoc papa papb papi papp pbac pbcc pbil pboc pbpa pcaa pcap pcba pcbc pcca pccc pccl pcia pcip pcll pclo pcoa pcpb pcpp piai pial piao pibb pibi pica picc pici pico piia piip pil- pila pili pill pilo piob pipa pipi pipo pipp plaa plab plac plai plap plcc plib plio plip plob ploc ploo plop plpa plpp poba pobo poca poco poia poil poio pola poli poll polo pool poop pop- popa popc popi popo popp ppac ppal ppap ppcc ppci ppib ppic ppli pplo ppoa pppa pppo pppp