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, 4, ['6193', '5871', '9871', '4821']
[EX A]: 1284178917853916

[EX Q]: 2, 3, ['T', '9003', '3731', '287', '7101', 'm', '2147', '6123', '6319']
[EX A]: 13733009

[EX Q]: 2, 3, ['4043', '6357', '5959']
[EX A]:
95957536