CCL: Software for 2D structure determination from empirical formulas

 Sent to CCL by: "Aurora E Clark" [auclark]![]
 Hello CCl'ers;
 I am interested to know if there is any available software that if given an
 empirical formula, can output
 all potential molecular formulas (2D connectivities) that conform to  chemical
 rules regarding bonding
 and valence?
 Thank you;