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: 4, 5, ['7631', 'I', '7755', 'M', '1871', 'a', '337', '9875', 'C', 'K', '4721', 's', '8399', 'h', 'g', '4573', '571', '5673', 'K', 'b', '6821', 's', '1105']

1871M