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: 9, 19, ['P', '2993', 'F', 'I', 'X', '6621', '131', 'R', '4457', '4917', 'i', 'C', 'y', '8363', 'O', 'i', '1367', 'Y', '6347']

6347Y1367iO8363yCi49174457