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: 3, 7, ['H', '689', 'd', '6759', '3531', 'd', '8393', 'N', 'd', 'o', '2377', '4065', '8021', 'c']

SOLUTION: 3938d13539576d

PROBLEM: 10, 17, ['H', '8993', 'l', 'W', 'T', '7135', 'A', '743', '7525', '1361', '9927', '3409', 'g', 'k', 'd', 'w', '7523', '1303']

SOLUTION: 3257wdkg904372991631

PROBLEM: 13, 13, ['4247', '933', '6049', '3319', '2581', 'G', '7467', 'j', 't', 'H', 'u', 'c', '8167']

SOLUTION:
7618