The algorithm pops the stack to obtain a new current node when there are no more children (when it reaches a leaf).

It’s startling that urban youth remain hypervisible symbols of the “culture of failure” but are never quoted as the ultimate stakeholders in education policy debates.

[T]he prince and Count Claudio, walking in a thicke pleached alley in mine orchard, were thus much ouer-heard by a man of mine: …

The key signatures of D major and b minor both have two sharps.