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: 22, 23, ['9853', '3839', '2279', 'o', 'Y', '6513', '4505', '1861', 'm', '8009', 'i', '8855', '6777', '3055', '4055', '3903', '5639', 'y', '579', '7271', '8021', 'R', '4547', '1439', '29', '1611', 't', '6279']

SOLUTION: 7454R

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

SOLUTION: 5181303

PROBLEM: 6, 7, ['2919', 'F', '3749', '2477', '359', 'L', '7421', 'q', '193', 'p', '4577', '4069']

SOLUTION:
1247L