Stephen Sondheim lyrics for a musical version of "The Exception and the Rule"; according to Robbins, Bernstein would not work without Sondheim. When Sondheim agreed, Guare asked: "Why haven't you all worked together since "West Side Story"?" Sondheim answered, "You'll see". Guare said that working with Sondheim was like being with an old college roommate, and he depended on him to "decode and decipher their crazy way of working"; Bernstein worked only after midnight, and Robbins only in the early morning. Bernstein's score, which was supposed to be light, was influenced by his need to make a musical statement. Stuart Ostrow, who
Stephen Sondheim not lend itself to musicalization, they began writing the musical version. The project had many problems, Rodgers' alcoholism among them; Sondheim, calling it the one project he regretted, then decided to work only when he could write both music and lyrics. He asked author and playwright James Goldman to join him as bookwriter for a new musical. Inspired by a "New York Times" article about a gathering of former Ziegfeld Follies showgirls, it was entitled "The Girl Upstairs" (and would later become "Follies"). In 1966, Sondheim semi-anonymously provided lyrics for "The Boy From...," a parody of "The Girl from Ipanema"