a-a a-b a-c aaa aab aac aad aak aar aaw ab- aba abb abc abd abk abr abw ac- aca acb acc acd ack acr acw ad- ada adb adc add adk adr adw aka akb akc akd akk akr akw ar- ara arb arc ard ark arr arw aw- awa awb awc awd awk awr aww baa bab bac bad bak bar baw bba bbb bbc bbd bbk bbr bbw bca bcb bcc bcd bck bcr bda bdb bdc bdd bdk bdr bdw bka bkb bkc bkk bkr bkw bra brb brd brk brr brw bwa bwb bwc bwd bwk bwr c-- caa cab cac cad cak car caw cba cbb cbc cbd cbk cbr cbw cca ccb ccc ccd cck ccr ccw cda cdb cdc cdd cdk cdr cdw cka ckb ckc ckd ckw cra crb crc crd crk crr crw cw- cwa cwb cwc cwd cwk cwr daa dab dac dad dak dar daw dba dbb dbc dbd dbk dbr dca dcb dcc dcd dck dcr dcw dda ddb ddc ddd ddk ddr ddw dka dkb dkc dkk dkr dkw dra drb drc drd drk drr drw dwa dwb dwc dwr dww ka- kaa kab kac kad kak kar kaw kba kbb kbc kbd kbk kbr kbw kca kcb kcc kcd kck kcr kda kdb kdc kdk kdr kkb kkc kkk kkr kra krc krd krk krr krw kw- kwa kwc kwd kwk kww ra- raa rab rac rad rak rar raw rba rbb rbc rbd rbk rbr rbw rca rcb rcc rcd rcr rcw rda rdb rdc rdd rdr rkb rkc rkk rra rrb rrc rrd rrk rrr rwa rwb rwc rwd rwr waa wab wac wad wak war waw wba wbb wbc wbd wbr wbw wca wcb wcc wcd wck wcr wcw wda wdb wdc wdr wka wkb wkc wkd wkr wkw wr- wra wrc wrd wrk wrr wrw wwa wwc wwd www