TASK DEFINITION: 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.
PROBLEM: 2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']

SOLUTION: hp3935

PROBLEM: 4, 13, ['9747', 'g', 'z', 'I', 'a', '8619', '6035', '4209', 'M', '5157', 'J', '2399', '3935', 'e', '531', '9759', '4253', '7311', 'G', '4751', '3589']

SOLUTION: 53939932J7515M902453069168aI

PROBLEM: 3, 4, ['q', 'b', '3985', 'N', '2033', 'u', 'c', 'F', 'd', '3785', 'C', '8721', 'F', '361', 'm', '9757', 's', '4127', 'X', 'a', 'S', '9969', '9371', '5307', 'M', '1149', '6833', 'm', 'W', 'f']

SOLUTION:
N5893