The task is to generate the correct answer for a given math problem.

Input: Consider Input: Problem: how many integers k greater than 100 and less than 700 are there such that if the hundreds and the unit digits of k are reversed , the resulting integer is k + 99 ?

Output: 50

Input: Consider Input: Problem: what is the remainder when 1201 1202 1205 1207 is divided by 6 ?

Output: 4

Input: Consider Input: Problem: a cyclist bikes x distance at 10 miles per hour and returns over the same path at 9 miles per hour . what is the cyclist ' s average rate for the round trip in miles per hour ?
Output: 9.