In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.

1, 2, ['5111', 'U', '441', '8381']
U1115

1, 2, ['8165', 'R', 'y', '9865', 'z', 'Z', '9719', '7485', '4049', 'm', 'V', '67', '6101', '5057', 'g', 'l', '6809', '1983', '1091', 'u', '9835']
R5618

13, 26, ['3659', '8235', 'd', 'l', 'K', 'g', 's', '2435', 'o', 'Q', '1877', 'a', '8413', '1693', 'N', '6307', '4575', '1919', 'l', '1325', 'K', 'w', 'N', 'e', '2045', '6197']

79165402eNwK5231l919157547036N39613148