Yet Another Tree Problem - Peg's Neighborhood. The tables are turned! Peg is stuck up in the tree and Cat must figure out how to get her down...by making a ladder out of found objects. Primary Content: Up, down; Secondary Content: Horizontal, vertical. The Romeo and Juliet Problem - Verona, circa 1500. Peg and Cat help their poetic pal Romeo reach Juliet's balcony using a series of horizontal and vertical lines. Primary Content: Horizontal, vertical; Secondary Content: Parallel.