how to do?

Exercise 1.31 You are asked to write a C program to reverse all the words in the given sentence without changing the relative order between words. Input The input consists of the number of test cases, m, in the first line and followed by m test cases. Each test case consists of a string with less than 256 characters. Each word's length is always less than 50. No special consideration is needed for punctuations. There are no leading and trailing space characters in each input line. There is only one single space between words