Each cell has a bit reserved for marking which is clear initially. During garbage collection all active cells are traced from the root and marked. Then all cells are examined. Unmarked cells are freed.

In addition suitable contents:
[ ag ] [ al ] [ am ] [ an ] [ ar ] [ as ] [ b ] [ ba ] [ bi ] [ bit ] [ cell ] [ ch ] [ cl ] [ co ] [ D ] [ E ] [ ec ] [ ed ] [ ee ] [ er ] [ es ] [ fo ] [ for ] [ fr ] [ free ] [ ga ] [ garbage collect ] [ garbage collection ] [ ge ] [ h ] [ in ] [ io ] [ is ] [ it ] [ ke ] [ ki ] [ ls ] [ ly ] [ ma ] [ ne ] [ ng ] [ ni ] [ om ] [ re ] [ ro ] [ root ] [ se ] [ serve ] [ T ] [ th ] [ tr ] [ ve ]