instruction:
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.
question:
1, 4, ['3633', 'k', '9685', 't']
answer:
t5869k3363


question:
2, 14, ['35', 'w', 'N', 'C', 'l', '9715', '8003', '9111', '6737', '5455', '5365', '859', '5979', 'U', 's', 's', '9599', 'g', '4577', '527', 'V', '5979']
answer:
U9795958563555457376111930085179lCNw


question:
11, 11, ['1475', '1971', 'o', '3991', 'x', 'y', 'r', '9195', 'R', 'B', 'f', '5529']
answer:

f