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]: 4, 5, ['B', 'H', 'y', 'y', 'K']
[EX A]: Ky

[EX Q]: 16, 26, ['d', 'o', '8115', '7489', 'n', '9243', '5821', '5381', '5059', 'V', 'T', '6557', '2885', '721', '3867', '5941', '7613', '2933', '253', 'l', '7339', '3743', 'U', '7921', 'Q', '2077']
[EX A]: 7702Q1297U34739337l352339231671495

[EX Q]: 2, 8, ['3783', 'I', '1629', '6561', '2761', '1255', '4365', 'q', '1755', '1197', 'm', 'E', 'n', 'I', '5427', '7511', 't', 'L']
[EX A]:
q56345521167216569261I