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]: 8, 13, ['O', '5581', 'r', 'H', 'f', 'y', 'A', 'g', '6023', 'G', 'G', 'm', '8767']
[EX A]: 7678mGG3206g

[EX Q]: 3, 4, ['3097', 'E', '4255', '1665', '7179']
[EX A]: 56615524

[EX Q]: 9, 11, ['w', '1853', 'd', '8185', '481', '6017', 'q', '6609', 'C', '3875', '695']
[EX A]:
5965783C