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]: 1, 3, ['7635', 'c', 'h', 'D', 'K', '7235', 'e']
[EX A]: hc5367

[EX Q]: 1, 9, ['C', 'V', '9945', 'W', 'R', 't', '471', 'Y', 'F', '2445', 'd', 'R', 'l', 'f', '5041', 'm', '7347', 'j', '6257']
[EX A]: FY174tRW5499VC

[EX Q]: 18, 24, ['S', '6227', 'y', '2361', 'f', 'f', 'X', 'C', '2099', 'E', 'U', 'S', '5465', 'b', 'V', 'b', '9641', '9283', '5653', '3443', '6301', '8253', 'r', 'U', 'L', 'I', 'W']
[EX A]:
Ur35281036344335653829