bbbb bbci bblb bcbc bccc bcci bccl bcit bctc bibb bibi bibl bicc bici bili bill bilt bitc bitt blbt blic blit btcc btcl bttb cbbc cbcc cbcl cbct cbit cblb cblc cbtc cbtl ccbc cccb cccc ccci cccl ccic ccii ccil cclc ccli cctb cctc cctl cctt cibc cibi cicc cici cict ciii ciit cili cill cilt citb citi citl citt clib clic clii clit cltb cltc ctbi ctic ibtb ibtc ibtl icbc iccb iccc icci iccl icct icll iiii iiit iitt ilbc ilic ilit ill- illi illt itic itil itll lbcc lcbc lccc lctl libc lict liii lilb lili lill lilt litb liti litl litt llcc lllc llll ltbl ltcc ltci ltib lttc tbcb tbcc tbil tbit tccc tctc tibi ticc tiit till tilt titc titi titt tlli ttbb tttt