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]: 10, 13, ['D', 'A', '4221', '7301', '1937', 'r', '5105', 'q', 'F', 'j', '9441', '6391', '7081', 'l', '6569', 'i', '8871', '5985']
[EX A]: 180719361449j

[EX Q]: 6, 8, ['4263', '4799', 'D', '4627', 'P', 'z', '8589', '5107', 'T', 'R', 'L', 'G', 'd']
[EX A]: 70159858z

[EX Q]: 11, 20, ['W', '521', '5083', 'g', '583', 'm', '1989', '1159', '897', '137', '15', '3313', 'C', '2021', 'X', 'M', 'N', 'k', 'E', '9295', '9911', '3927', '473', '7667', '3051']
[EX A]:
5929EkNMX1202C313351