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: 1, 2, ['S', '411', '3257', 'c', '3483', 'i', 'h', 't']

SOLUTION: 114S

PROBLEM: 16, 17, ['E', '3657', 'O', 'B', 'V', '3761', 'v', '563', '1623', 'J', '5961', 'h', '5241', '9983', '3325', '1513', 'R']

SOLUTION: R3151

PROBLEM: 12, 14, ['a', '1907', '6787', '1237', '7573', 'u', 'c', 'K', '7869', 'p', '9827', '9401', 'n', '3209', '5233', 'o', 'e', 'q', 'f', 'r', 'j', '1127', 'p']

SOLUTION:
9023n1049