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: 3, 10, ['g', '5155', 'p', '6627', 'W', 'q', '2851', 'm', 's', '7781', 'u', '9739']

A: 1877sm1582qW7266p
****
Q: 1, 1, ['C', '6223']

A: C
****
Q: 19, 22, ['s', 'W', 'U', '3629', '6587', 'O', '4353', '1725', '7941', '9787', '2099', '4701', 'K', '7691', '6745', 'o', 'D', 'm', '161', 'O', '5135', 'R']

A:
R5315O161
****