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]: 6, 9, ['6157', 'Z', 'f', 'N', 'Z', 'T', '7299', 'G', 'w', '3923', 'H', '3255']
[EX A]: wG9927T

[EX Q]: 1, 1, ['T', 'Y']
[EX A]: T

[EX Q]: 14, 15, ['8299', 'q', '729', '9521', 'u', '1579', 'r', '4601', 'e', '3603', '8099', 'O', '2313', 'D', 'l', '2993']
[EX A]:
lD