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]: 3, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']
[EX A]: Sl1739z30843777U1127S

[EX Q]: 13, 15, ['L', 'A', '2959', 'g', '7157', '9131', 'o', 'D', 'q', 'd', 'A', '4249', 'K', 'U', '4805', 'h', '7981']
[EX A]: 5084UK

[EX Q]: 1, 1, ['G', 'T', 'm', '281', 'L', 'Q']
[EX A]:
G