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.

Q: 1, 2, ['6627', 'J']

A: J7266
****
Q: 8, 10, ['f', 'F', '4775', 'F', 'w', 'r', 'v', 'S', 'N', '479', 'e', 'u', 'e', 'e', '2081']

A: 974NS
****
Q: 15, 19, ['5087', '1975', 'e', 'A', 'U', '9457', 'T', '9801', 'R', 'W', 'i', '543', 'O', 'a', 'Y', 'P', '8089', '6963', 'C', '9857', '6883', 'y']

A:
C36969808PY
****