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: 1, 13, ['497', 'v', '7469', 'c', '8913', '533', 'P', '3051', '2237', 'R', '9609', 'J', 'R', 'x', '5787', '2203', '5943', '6847', '8989', 'A', '5227', 'O', 'M', 'n', '4993']

SOLUTION: RJ9069R73221503P3353198c9647v794

PROBLEM: 2, 8, ['9691', 'u', 'o', '4027', 'q', '7799', 'v', '6433', '6817', 'u', 'w', 'Z']

SOLUTION: 3346v9977q7204ou

PROBLEM: 5, 14, ['3711', '1151', 'w', '7445', 'c', 'd', '8951', '6635', '2435', '1865', 'B', 'L', '8767', 'c', '7975', 'X', '1701', '505', '8851', 'I']

SOLUTION:
c7678LB5681534253661598dc