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, 3, ['4181', '3741', 'Q']
[EX A]: Q14731814

[EX Q]: 8, 15, ['l', 'p', '7691', 'q', '5663', '41', 'P', '2779', '7265', 'V', '4931', '8979', 'l', 'l', 'l', '45', '1245', 'F', '1139', '3531', '5337', '369', 'g', 'Q']
[EX A]: lll97981394V56279772

[EX Q]: 18, 21, ['i', '2647', '9377', 'n', '5357', 'O', 'c', 'J', 'U', '8855', '7935', 'f', 'j', 't', '1037', 'D', 'K', 'v', '3773', '4235', '5221', 'P', '6999', '3669', '5805', 'n', '8521', '3715', '7501']
[EX A]:
122553243773v