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, 6, ['6717', '6639', 'l', 'i', 'o', '1819']

SOLUTION: 9181oil9366

PROBLEM: 4, 8, ['g', '6711', '6701', 'p', '6345', 'W', '9953', '3185', 'W']

SOLUTION: 58133599W5436p

PROBLEM: 2, 4, ['1243', '7907', 'J', 'q', 'U', 'C', '1707']

SOLUTION:
qJ7097