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: 6, 16, ['q', '7473', 'G', 'I', 'i', '2991', '8855', 'J', '421', '5037', '7225', '7099', 'Z', 'O', '9541', 'X', 'I', '4827', 'r', 'i']

X9541OZ709972255037421J88552991