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: 7, 8, ['U', 't', '8289', '9391', '1751', 'Y', '9319', 'A', 'Q', 'd', 'B', '2521', '2455']

SOLUTION: A9139

PROBLEM: 3, 10, ['q', '8815', '5453', 'n', '5103', 'X', 's', '9739', '1301', 'v', 'F', 'm', 'S', 'd', '6649', '2087', '4295', '8891', '5845', '577', 'I', 'U', '9195', 'E', 'o', '7229']

SOLUTION: v10319379sX3015n3545

PROBLEM: 8, 11, ['9137', '8747', '755', '7751', '145', 'v', 'c', '6387', '1175', 's', '7909', '4467', '9395', 'Z', '2509', 'A', 'N', '8339', '7775', 'V', 'b', '6153', 'G', 'Q', 'W', '1245', 'w']

SOLUTION:
9097s57117836