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, 21, ['9847', '3163', 'L', 'E', 's', 'I', 'H', 'e', 'l', '8875', '547', 'F', '4221', '5105', '5409', 'M', '6617', 'Z', 'g', '9257', 'l', 'q', 'p', 'Q', '6755', '265', '9845']
[EX A]: l7529gZ7166M904550151224F7455788le

[EX Q]: 4, 13, ['1283', 'G', 'U', 'F', '5549', 'n', '565', '2889', 'Z', 'V', '2511', 'g', '6311', 'd', 'Z', 'X', '4305', '5323', 'M', 'z', '5951', 'u', 'A', 'T', 'v', 'z', 'L']
[EX A]: 1136g1152VZ9882565n9455F

[EX Q]: 17, 28, ['1651', 'C', '5099', '3821', '1255', 'u', 'Y', 'c', 'p', '9911', '6659', 'y', '5083', '4143', '4417', 'R', '4745', 'W', '165', 'Z', 'O', 'e', '3723', '3343', 'F', '4309', '7279', '6735']
[EX A]:
537697279034F34333273eOZ561W5474