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.

4, 6, ['w', '8785', '2921', 'J', 'P', 'g', '9273', '5439', 'O', 'F', 'u', '967', '9007']
gPJ

3, 3, ['8097', '3167', '809']
908

2, 4, ['1047', '673', 'J', 'd', 'J', '5079', 'z', 'V', 'g', 'o', '493', '7775', '751', '5909', '1691', '2917', 'S', '1243', 'J', '4087', 'M', 'P']

dJ376