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, 8, ['7991', '7999', '8575', '4211', '6003', '2483', '7877', '7249', 'K', '21']
[EX A]: 94277787384230061124575899971997

[EX Q]: 4, 9, ['8189', 'M', 'Y', '2695', '3381', '3829', '117', '3843', '7469', '3611', 'e', '4127', 'V', 'X', 'V', '4535', 'M']
[EX A]: 96473483711928318335962

[EX Q]: 2, 4, ['9727', 'm', '2353', '8183']
[EX A]:
38183532m