-ol c-- ccc ccd cce ccl cco cct cdc cdd cde cdl cdo cdt ce- cec ced cee cel ceo cet cl- clc cld cle cll clo clt co- coc cod coe col coo cot ctc ctd cte ctl cto ctt dcc dcd dce dcl dco dct ddc ddd dde ddl ddo ddt de- dec ded dee del deo det dl- dlc dld dle dll dlo dlt doc dod doe dol doo dot dtc dtd dte dtl dto dtt ec- ecc ecd ece ecl eco ect ed- edc edd ede edl edo edt eec eed eee eel eeo eet elc eld ele ell elo elt eo- eoc eod eoe eol eoo eot etc etd ete etl eto ett lcc lcd lce lcl lco lct ldc ldd lde ldl ldo ldt lec led lee lel leo let llc lld lle lll llo llt loc lod loe lol loo lot ltc ltd lte ltl lto ltt oc- occ ocd ocl oco oct odc odd ode odl odo odt oec oed oee oel oeo oet olc old ole oll olo olt oo- ooc ood ool ooo oot ot- otc otd ote otl oto ott tcc tcd tce tcl tco tct tdc tdd tde tdl tdo tdt te- tec ted tee tel teo tet tlc tld tle tll tlo tlt to- toc tod toe tol too tot ttc ttd tte ttl tto ttt