In Mexico, or Spain for that matter, garlic appetite control tea is served up for coughs or colds. It served as a county seat in the course of the Qin and Han dynasties, but was subsequently taken by nomadic tribes. The unique Block TEA applies the XTEA round perform to every phrase in the block and combines it additively with its leftmost neighbour. Like TEA, XTEA is a 64-bit block Feistel cipher with a 128-bit key and a instructed sixty four rounds. Formally talking, XXTEA is a constant incomplete supply-heavy heterogeneous UFN (unbalanced Feistel network) block cipher. XXTEA operates on variable-size blocks which can be some arbitrary multiple of 32 bits in dimension (minimum sixty four bits). An assault revealed in 2010 by E. Yarrkov presents a chosen-plaintext attack against full-spherical XXTEA with vast block, requiring 259 queries for a block measurement of 212 bytes or more, and negligible work. To cipher "212 bytes or more" algorithm performs just 6 rounds, and punctiliously chosen bit patterns permits to detect and analyze avalanche effect. A single bit change will change about one half of the bits of all the block, leaving no place where the modifications start. This one sounds strange however the truth is it is an previous English tradition.