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PHILADELPHIA (CBS) — The company behind “Sesame Street” is suing the creators of an upcoming R-rated puppet comedy.

Melissa McCarthy stars in “The Happytime Murders,” set to release this August.

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The film’s tag line is “No Sesame. All Street.” “Sesame Workshop” claims it deliberately confuses consumers into thinking it’s affiliated with “Sesame Street.”

“The Happytime Murders” is about a human detective who teams up with a puppet partner to investigate puppet murders.