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, 3, ['T', '9003', '3731', '287', '7101', 'm', '2147', '6123', '6319']

SOLUTION: 13733009

PROBLEM: 1, 3, ['o', 'o', '4511', '9203', '6071', 'Q', '5337']

SOLUTION: 1154oo

PROBLEM: 3, 7, ['z', 's', '2011', 'j', '7597', 'n', '1789', '2475', '6369', '4765', '7953', '2653']

SOLUTION:
9871n7957j1102