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, ['Q', '6249', 'm', 'H', 'x', 'b', 'Z', 'z', '15']
9426Q

5, 15, ['U', 'z', '9255', 'F', 'G', '7403', '6287', 'm', 'P', '4715', '1613', 'G', '1911', 'S', '8823', '9415', 'z', '6359', '1225', 'T', 'z', '1557', 'r', 'M', 'i', '5047', 'b', 'W']
3288S1191G31615174Pm78263047G

2, 12, ['2339', 'q', '5609', 'B', 'G', '5869', '3573', '1963', '7817', '6279', 'l', 'e', 'T', 'C', '5469', '3983', 'C', '1091', 'N', '1025', '5813', 'H', 'p']

el97267187369137539685GB9065q