a-a a-b a-c aaa aab aac aad ab- aba abb abc abd ac- aca acb acc acd ad- ada adb adc add baa bab bac bad bba bbb bbc bbd bca bcb bcc bcd bda bdb bdc bdd c-- caa cab cac cad cba cbb cbc cbd cca ccb ccc ccd cda cdb cdc cdd daa dab dac dad dba dbb dbc dbd dca dcb dcc dcd dda ddb ddc ddd

aaaa aaab aaac aaad aaba aabb aabc aabd aaca aacb aacc aacd aada aadc abaa abab abac abad abb- abba abbb abca abcb abcc abcd abda acaa acab acac acad acba acca accc accd acda acdb acdc adaa adab adac adad adba adbc adcc adda addc addd baaa baad baba babb bac- baca bacc bada badb badd bbad bbbb bbdd bcaa bcbc bcca bccc bcda bdbc bddc c-cd caaa caab caac caba cac- caca cacc cada cadc cadd cbac cbbc cbca cbcc cbdb cbdc ccaa ccab ccac ccad ccba ccbc ccca cccb cccc ccdc cdaa cdac cdad cdda cddb daab daad daba dabb daca dada dbcc dcbc dcca dccb dccc dcdb dddd

-aaa- -abad aaadc aabaa aabba aacbc aadac abaab ababa abaca abada abbac abbad abccc abcdb acaca acacb accad adaba adada bacab bacca c-a-c ca-ca caaba cadac ccccc d-a-d daada dabba dacca dadda dccab ddddd

aaaaba ababda abacab addada baabaa baabda bacaba badbad bbbbbb cadaba cadca dababa dabaca dabdab dadaab dadada

abadaba abdabad bac-cab bbbbbbb dabbaba

abadabad babaabad bbbbbbbb

baabaabaa badabadda ddddddddd

aaaaaaaaaaaaaaa bbbbbbbbbbbbbbb ccccccccccccccc