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]: 3, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']
[EX A]: Sl1739z30843777U1127S

[EX Q]: 2, 2, ['4359', 'G', 'A']
[EX A]: G

[EX Q]: 19, 23, ['q', 'v', '5813', '3773', '8367', '9619', '307', '4065', 'P', '7139', '4021', 'a', 'r', '3615', '2427', '2403', 's', '6439', 'W', '9481', '4361', 'm', '269', 'r', 'r', '7831']
[EX A]:
962m16341849W