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.

Input: Consider Input: 4, 4, ['339', '1345', '9749', '6877', 'b', 'K', 'f', '1443']

Output: 7786


Input: Consider Input: 10, 17, ['H', '8993', 'l', 'W', 'T', '7135', 'A', '743', '7525', '1361', '9927', '3409', 'g', 'k', 'd', 'w', '7523', '1303']

Output: 3257wdkg904372991631


Input: Consider Input: 4, 15, ['3293', 'c', '855', 'm', '9883', '2651', 'q', 'w', '9289', 't', 'r', 'O', '5237', 'i', '3649', 'J', 'Q', '6799', '4329', 'e', '1963', 'r']


Output: 9463i7325Ort9829wq15623889m