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: 3, 12, ['G', 'C', 'B', '3939', 'F', '8183', '1127', 'C', '4053', 'e', '6827', 'c', 'p', '4677', 'O', '3351', '5097', '7389']

c6827e4053C11278183F3939B