It's The Alchemist's birthday, but thanks to the NYPD's "Rap Intelligence Unit," he and Prodigy are forced to celebrate in a jail cell, and soon after, P is headed upstate. But even Prodigy says prison changed him for the better.     LANGUAGE WARNING: The Realness contains strong language that some listeners may find offensive.  WNYC’s health coverage and The Realness by Only Human is supported in part by the Robert Wood Johnson Foundation, Jane and Gerald Katcher and the Katcher Family Foundation, Science Sandbox, an initiative of the Simons Foundation, and the Alfred P. Sloan Foundation.  Audio of Prodigy on Questlove Supreme is provided by Pandora, which also has a recording of Mobb Deep's classic hit "Shook Ones (Part II)" performed by Nas.