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]: 5, 11, ['4381', '7607', '3995', '7639', 'W', '2377', '2639', 'Z', 'D', '4511', 'K', '3211', '6939', 'n', 'J', 'd', '9647']
[EX A]: K1154DZ93627732W

[EX Q]: 2, 3, ['4541', 'B', '9655', '8453', 'r', 'i', 'P']
[EX A]: 5569B

[EX Q]: 8, 11, ['1495', 'm', '1019', 'P', 'O', 'K', '2995', 'k', 'X', 'u', 'V', 'D', '7231', '4473', 'N', 'o', '3433']
[EX A]:
VuXk