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, 10, ['9543', '2797', '3939', '8207', '329', 'l', '5353', '8849', '5579', '7445']
[EX A]: 5447975594883535l92370289393

[EX Q]: 27, 28, ['k', '2839', 'e', 'j', 'A', '5649', 'N', '2829', 'u', '6889', '9691', '6695', '9849', '8171', 'a', 'D', '1887', 'Q', 'P', 'H', 'n', '6333', '1491', 'U', '5313', 'A', '699', '665', 'N', 'q']
[EX A]: 566996

[EX Q]: 1, 2, ['X', '5693', '5871', 'd', 'y']
[EX A]:
3965X