a-a a-b a-c aaa aab aac aad aak ab- aba abb abc abd abk ac- aca acb acc acd ack ad- ada adb adc add adk aka akb akc akd akk baa bab bac bad bak bba bbb bbc bbd bbk bca bcb bcc bcd bck bda bdb bdc bdd bdk bka bkb bkc bkk c-- caa cab cac cad cak cba cbb cbc cbd cbk cca ccb ccc ccd cck cda cdb cdc cdd cdk cka ckb ckc ckd daa dab dac dad dak dba dbb dbc dbd dbk dca dcb dcc dcd dck dda ddb ddc ddd ddk dka dkb dkc dkk ka- kaa kab kac kad kak kba kbb kbc kbd kbk kca kcb kcc kcd kck kda kdb kdc kdk kkb kkc kkk

a-ak aaaa aaab aaac aaad aaba aabb aabc aabd aaca aacb aacc aacd aack aada aadc aaka abaa abab abac abad abak abb- abba abbb abca abcb abcc abcd abda acaa acab acac acad acba acca accc accd acda acdb acdc ackd adaa adab adac adad adak adba adbc adcc adda addc addd akaa akca akka baaa baad baak baba babb bac- baca bacc back bada badb badd bak- baka bbad bbbb bbdd bcaa bcbc bcca bccc bcda bdbc bddc c-cd caaa caab caac caba cac- caca cacc cack cada cadc cadd caka cbac cbbc cbca cbcc cbdb cbdc cbka ccaa ccab ccac ccad ccba ccbc ccca cccb cccc ccdc cdaa cdac cdad cdba cdda cddb ckac ckbc ckck daab daad daba dabb daca dada daka dbcc dcbc dcca dccb dccc dcdb dddd dkba dkdc kaaa kaab kaak kaba kabb kabc kabd kacb kacc kacd kad- kada kadd kaka kakc kakk kbaa kbab kbac kbad kbak kbba kbbb kbbc kbbd kbbk kbca kbcb kbck kbdb kbkb kbkk kcaa kcab kcac kcad kcba kcbc kcbd kcbk kcca kccb kccc kccd kcck kcda kcdc kcdd kckc kckk kdaa kdab kdac kdad kdak kdbb kdca kdcc kdcd kddb kddc kddd kddk kdka kdkb kdkd kdkk kkaa kkac kkba kkbb kkbd kkcb kkcd kkck kkda kkdc kkdd kkkk

-aaa- -abad aaadc aabaa aabba aacbc aadac abaab ababa abaca aback abada abaka abbac abbad abccc abcdb acaca acacb acack accad adaba adada adaka akaba akkad babak babka bacab bacca back- backa badak bakka bckdk c-a-c c-kad ca-ca caaba cacak cadac ccccc d-a-d daada dabba dacca dacka dadda dakka dccab ddddd k-b-d kaaba kabaa kabab kabad kabak kabba kakka

aaaaba ababda abacab ackack addada akbaba akkaba baabaa baabda bacaba badbad bbbbbb caback cadaba cadca cakcak dababa dabaca dabaka dabdab dadaab dadada kaback kabaka kabbad kadaba kadaka kadbak kakkad kakkak

abadaba abdabad ack-ack bac-cab badback bbbbbbb cabback dabbaba kacabac

abadabad babaabad bbbbbbbb kabkabad kadakkad kakaabad

abakabaka baabaabaa badabadda ddddddddd

aaaaaaaaaaaaaaa bbbbbbbbbbbbbbb ccccccccccccccc