Three trees, a Pine, a Maple, and a Cedar, are growing in a forest. The height of an Oak tree is known, but the heights of the Pine, Maple, and Cedar are not. The Pine tree's height is greater than the Oak's. The Maple tree's height is less than the Oak's. The Cedar tree's height is equal to the Oak's. List the heights from tallest to shortest for Pine (P), Maple (M), and Cedar (C).