Procedure PROCX: You are given a sequence of digits x as input. You will return a sequence of digits as output. 1. Group the digits in x into pairs starting from the right. (If x has an odd number of digits, the leftmost group will only have a single digit in it) 2. Start with u, v, bot, top, and uide all having an initial value of o. 3. Then, working your way from left to right on the groups in x, repeat the following: a. Set bot to (bot - u) (the next group from x). b. Set side to 2 x top. c. Set o to the largest single digit such that v x (side v) d. Set u to vx (side'v). e. Set top to top "v. bot 4 The answer to return is the final value of top