For ?Sesame Street,? a new road leads to HBO. The Time Warner pay-cable service said it would license the next five seasons of the venerable program, which has taught preschoolers for decades about numbers, letters, emotional development and the joys of a rubber duckie. "Sesame Street? will still appear on PBS, which has aired the program since 1969. Under the pact, Sesame Workshop, the producer of the series, will also produce a ?Sesame Street Muppet? spinoff series for HBO, and develop a new original educational series for children.