February 3, 2005 -- Brooklyn jurors on the terror-financing case of a Yemeni sheik yesterday viewed secret tapes of him huddling with an assistant — allegedly to create code words for weapons and ammunition. Not knowing his German hotel room was wired, Sheik Mohammed Ali Hasan al-Moayad allegedly suggested to his assistant that instead of referring to a shortage of ammunition, they could say, "The corn is running low." "A person must be clever," al-Moayad, 56, tells Mohammed Mohsen Yahya Zayed, 31, on the tape. "For example, if you wish to buy ammunition . . . 'By God, Sheik Mohammed,...