Definition: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant string. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j. Perform the operations in order, i.e., do not concatenate the elements and then reverse the string.
Input: 3, 30, ['7121', 'v', 'k', 'q', 'v', 't', '5597', '5263', 'c', 'r', 'd', 'g', 'D', '1507', 'O', '3079', '4251', 'F', '6575', '1495', 'u', 'a', '7273', '2361', '4365', 'e', 'f', '3449', '4237', 'f']

f42373449fe436523617273au14956575F42513079O1507Dgdrc52635597tvqk