a-a a-b a-c aaa aab aac aaj aan aar ab- aba abb abc abj abn abr ac- aca acb acc acj acn acr aja ajb ajc ajj ajn ajr an- ana anb anc anj ann anr ar- ara arb arc arj arn arr baa bab bac baj ban bar bba bbb bbc bbn bbr bca bcb bcc bcj bcn bcr bja bjc bjj bjn bjr bna bnb bnc bnj bnn bnr bra brb brj brn brr c-- c-j caa cab cac caj can car cba cbb cbc cbj cbn cbr cca ccb ccc ccj ccn ccr cja cjb cjc cjr cn- cna cnb cnc cnj cnn cnr cra crb crc crj crn crr jaa jab jac jaj jan jar jba jbc jbj jbr jca jcb jcc jcr jja jjb jjc jjj jjr jna jnc jnj jnn jnr jra jrb jrc jrn jrr naa nab nac naj nan nar nba nbb nbc nbn nbr nca ncb ncc ncn ncr nja njc njn nna nnb nnc nnn nra nrb nrc nrj nrn nrr ra- raa rab rac raj ran rar rba rbb rbc rbn rbr rca rcb rcc rcj rcn rcr rja rjc rjr rna rnb rnc rnn rnr rra rrb rrc rrn rrr