BACKCROSSING

ab ag ai an ar as ba bi bo go in is ka ki na no oi on or os si so

abo abs ago ags ain air ais ani arb arc ark ars ask ass bag ban bar bas big bin bio bis boa bog bos bra bro cab can car cig cis cob cog con cor cos gab gan gar gas gib gin goa gob gor gos ick ink ins ion irk kab kas kin kir kis koa kob koi kor kos nab nag nib nob nog nor nos oak oar oba obi oca oka ons ora orb orc ors rag rai ran ras ria rib rig rin rob roc sab sac sag sib sic sin sir sis ska ski sob son sos sri

abos abri agin agio agon ains airn airs akin anis arbs arco arcs arks asci asks back bags bang bani bank bans bark barn bars bask bass bias bigs bins biog bios birk biro bisk boar boas bock bogs bong bonk bora bork born bosk boss brag bran bras brig brin brio bris bros cabs cain cans carb cark carn cars cask ciao cigs cion cobs coca cock cogs coin coir coni conk cons cork corn cors coss crab crag crib cris croc gabs gain garb gars gibs gink gins girn giro gnar goas gobs grab gran grin grok icon ikon inks inro ions irks iron isba kabs kain kaon karn kbar kina king kino kins kirn kirs kiss knar knob koan koas kobs kois kora kors koss kris nabs nags naoi naos narc nark nibs nick nobs nock nogs noir nori oaks oars obas obia obis ocas oink okas okra orbs orca orcs osar ossa rack ragi rags rain rais raki rang rani rank rias ribs rick rigs ring rink rins risk roan robs rock rocs sabs sack sacs sago sags sain saki sang sank sans sari sark scab scag scan scar sibs sick sics sign sika sing sink sins sirs skag skas skin skis snag snib snob snog soak soar soba sobs soca sock song sons sora sorb sori sorn sris