Pentominous (Either Or)

Pentominous is due to Grant Fikes. Although the Either Or variant is common, I reckon this is the first ever 'Pentominous Either Or' to be put out on the internet (do link me to one if I am wrong) Rules of Pentominous Either OR:

Divide the grid along the gridlines into Pentominoes (or 5-cell Polyominoes) such that no two identical shapes (rotations and reflections amount to the same shape) share an edge. Also, the shapes may be rotated and reflected. Some cells contain two given letters which indicate that the cell must be part of either of the two pentomino shapes associated with the given letters. An inventory of pentominoes is given below the puzzle but not all shapes must be used.