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: 6, 14, ['505', 's', '3619', 's', '2871', '6403', 'b', 'M', 'Q', '9645', '9425', 'V', '873', 'l', '2917', 'Q', '9465', 'z', '1513', 'S', 'e', '9733', '7669', 'B']

SOLUTION: l378V52495469QMb3046

PROBLEM: 1, 9, ['u', 'f', 'Q', 'z', 'Y', 'x', '1237', 'T', '5395', 'E', 'D', 'E', 'd', '2319', '8825', '711', '6667', '3109', 'b']

SOLUTION: 5935T7321xYzQfu

PROBLEM: 6, 7, ['H', '5501', 'P', '993', 'T', '2269', 'P', '1235', 'g', 'J', '1613', 'U', 'B', 'l']

SOLUTION:
P9622