What are the estates created in this situation(O, A, Child, grandkids) with the jurisdiction going by the rule of perpetuities, Shelly's rule, and doctrine of worthier title.

"O to A for life, then to the oldest child of A who survives A for his or her life, then to A's grandchildren." At the time of the conveyance, A is married, has 2 children, and 1 grandchild