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.

[Q]: 3, 3, ['x', 'v', 'p', '4337', '635', '8927', 'B']
[A]: p


[Q]: 3, 7, ['u', '1307', 'F', '8027', 'r', '4559', 'F', 'm', '9805', '5063']
[A]: F9554r7208F


[Q]: 19, 21, ['8457', '2609', 'd', 'Z', '1581', 'M', '4641', 'H', '8313', '8097', 'T', '4323', 'a', '755', '3371', '6459', '8415', '9335', '6633', '6553', '3673', '6099', 'x', '9395', 'G']
[A]:
376335563366