Discussed: the consonant R, the vowel digraph ow as in grow, the consonant blend gr-, and the same vowel sound spelled two ways: ir and ur.
Casts:
Bill Cosby, Mel Brooks, Denise Nickerson, Lee Chamberlin, Irene Cara, Todd Graff, Hattie Winston, Gene Wilder, Rita Moreno, Zero Mostel, June Angela, Luis Ávalos, Judy Graubart, Jim Boyd, Bayn Johnson, Morgan Freeman, Morgan Freeman, Morgan Freeman, Lily Tomlin, Joan Rivers, Mel Blanc