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, 15, ['H', '7099', '6135', '6593', 'x', '7747', '8613', 'e', 'i', '5639', '9619', '5959', 'U', 'P', '1037', 'L', 'Z', 'j', '8555']

1037PU595996195639ie86137747x659361357099