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: 21, 24, ['t', '1315', '1977', '8701', 'w', '2899', '9389', 'c', 'F', '2949', '9591', 'Y', '3127', '5887', 'D', '6527', 'I', '3229', '6585', '5375', '6289', 'j', '1775', 'n', 'O', '4741']

SOLUTION: n5771j9826

PROBLEM: 2, 11, ['6519', 'l', '6577', 'z', '4271', 'R', 'O', '7809', 'K', 'V', '4531']

SOLUTION: 1354VK9087OR1724z7756l

PROBLEM: 13, 22, ['T', '3363', 'F', 'X', 'm', 'j', '7307', 'n', '3373', 'd', '3291', '243', '861', '6561', 'a', 'R', '7103', 'z', 'z', '4687', 'v', '8301', 'j', 'k', 'T']

SOLUTION:
1038v7864zz3017Ra1656168