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: 2, 17, ['3943', '8813', '7693', 'U', '9159', '2455', 'm', '8333', '2619', '2817', '7641', '1361', 'X', 'I', '7743', '123', 's', '3887', '6315']

s1237743IX13617641281726198333m24559159U76938813