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, 8, ['9669', '9577', '2831', 'Y', 'y', 'q', 'f', 'b', 'L', 'v', '5545', '7305']
[EX A]: bfqyY138277599669

[EX Q]: 2, 2, ['6099', 'r']
[EX A]: r

[EX Q]: 3, 8, ['T', 'B', 'Q', '3417', 'L', '7755', '8083', 'F', 'c', '7883', '2395', 'e']
[EX A]:
F38085577L7143Q