BACKSPACING

aa ab ag ai an as ba bi in is ka ki na pa pi si

aas aba abs aga ags ain ais ana ani ask asp baa bag ban bap bas big bin bis cab can cap cig cis gab gan gap gas gib gin gip ick ink ins kab kas kin kip kis nab nag nap nib nip pac pan pas pia pic pig pin pis psi sab sac sag sap sib sic sin sip ska ski spa

abas agas agin ains akin anas anga anis ansa asci baas back bags bang bani bank bans baps bask bias bigs bins bisk cabs caca cain cans caps casa cask cigs gabs gain gaps gasp gibs gink gins gips inks isba kaas kabs kain kana kapa kina king kins kips knap nabs nags napa naps nibs nick nipa nips paca pack pacs paik pain pang pans pian pias pica pick pics pigs pika pina ping pink pins sack saga sain saki sang sank scab scag scan sick sign sika sing sink skag skin skip snag snap snib snip span spic spik spin