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.

[EX Q]: 3, 4, ['4887', 'N', 'y', '2813', 'C', 'J', 'v', '3199']
[EX A]: 3182y

[EX Q]: 7, 14, ['j', '2199', '6995', 't', 'U', 'C', '1589', '7061', '851', 'N', '7923', '7387', '2053', 'L', 'y', '3685', 'X', 'C', '4679', '3691', '2991', 'f']
[EX A]: L350278373297N15816079851

[EX Q]: 3, 8, ['i', 'o', '775', 'u', '7531', 'a', 'P', '6605']
[EX A]:
5066Pa1357u577