Task: songer_crmproc1

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the most frequently cited federal rule of criminal procedure in the headnotes to this case. Answer "0" if no federal rules of criminal procedure are cited. For ties, code the first rule cited.

PER CURIAM.
Donald H. Sharpe filed a petition under Title 28 U.S.C.A. § 2255, to vacate a sentence imposed upon him for violation of the Dyer Act, 18 U.S.C.A. §§ 10, 2311-2313. From the Court’s action in dismissing the petition this appeal was taken.
Sharpe alleged that his Court-appointed counsel was incompetent, that his plea was induced by a promise of a suspended sentence, that his conduct did not constitute a violation of the Dyer Act, and that he tendered his plea without full understanding of its nature and effect. On procedural grounds he further complains that the Court failed to comply with Rule 11 of Federal Rules of Criminal Procedure, 18 U.S.C.A., by not inquiring adequately to ascertain whether the plea was made voluntarily and with understanding.
The petitioner further complains that he was not accorded a hearing on his petition.
An examination of the record disclosed mo basis for any of the complaints.
Affirmed.

Question: What is the most frequently cited federal rule of criminal procedure in the headnotes to this case? Answer with a number.
Answer:

Answer: 11