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: 6, 10, ['4631', 'q', '4689', 'w', '499', '3383', '8091', '7699', 'H', '6359', 'I', '267', 'v', '3295', 'H', '4815', 'u', 'o', '5023', 'n', '9471', '7435']

SOLUTION: 9536H996719083833

PROBLEM: 1, 4, ['6969', 'P', '8161', '6347', 'P', 'S', 'z']

SOLUTION: 74361618P9696

PROBLEM: 3, 10, ['5449', '7391', '6379', 'x', '8483', '2263', 'H', 'o', 'M', '9957', 'j', 'F', 'D', 'i', '2783', 'w', '7949']

SOLUTION:
7599MoH36223848x9736