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: 5, 6, ['7565', '6525', '7421', 'u', '303', '1815', '273', '6725', 'i']

SOLUTION: 5181303

PROBLEM: 2, 4, ['5983', 'I', '9531', 'U', 'P', '1383', 'Y']

SOLUTION: U1359I

PROBLEM: 4, 9, ['O', '6747', '545', '2251', '4261', 'P', 'C', 'p', 'P', 'd', 'L']

SOLUTION:
PpCP16241522