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.

9, 11, ['m', 'r', '5241', 'x', 'Q', 'f', '1167', '1869', '4753', 'g', 'y', 'M', '7109', '2177', 'h', 'K', '5481', '9731', 'u', 'K', 'E', 't', '4867', '4539', '7943', 'W']
yg3574

3, 5, ['C', '4345', 'T', 't', 'U', 'p']
UtT

16, 21, ['e', '9909', '6989', 'o', 'M', 'a', '5333', '1285', '6621', '4785', 'x', 'y', '1663', 'F', 'n', '6701', '5013', '209', '9111', 'u', 'v', '3121']

vu111990231051076