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, 10, ['X', '3687', 'p', '973', '7395', 'T', '9981', 'J', '261', 'V', '8571', 'I', '7911', 'F', 'K', 'J', 'T', 'F', '2249', '2975', 'D', '6279', '1529', '2957', 'y', '5285', 'X', 'v', '8115']
[EX A]: V162J1899T5937379p7863X

[EX Q]: 4, 13, ['6993', '5601', 'n', 'J', 'E', 'M', 'd', 'T', 'V', 'C', '4969', 'J', 'F']
[EX A]: FJ9694CVTdMEJ

[EX Q]: 19, 21, ['d', '7479', '6065', 'p', '1415', 'O', 't', '7579', 'W', '471', 'T', '6467', 'X', 'M', 'P', '1377', '153', 'w', '5141', '6157', '3939', 'L', '6597', '8881', '4301', 'g']
[EX A]:
939375161415