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, 4, ['E', 'k', '4697', 'f', 'J', 's', '1265', '4673', 'D', '3345', 'n', '5593', '2249', '5951']

SOLUTION: f7964

PROBLEM: 4, 13, ['1283', 'G', 'U', 'F', '5549', 'n', '565', '2889', 'Z', 'V', '2511', 'g', '6311', 'd', 'Z', 'X', '4305', '5323', 'M', 'z', '5951', 'u', 'A', 'T', 'v', 'z', 'L']

SOLUTION: 1136g1152VZ9882565n9455F

PROBLEM: 11, 13, ['5919', 'Y', 'd', 'R', '357', '3547', '6205', '6391', '6769', 'I', '1823', 'c', '5691', '7387', 's', '2067', '5835', '4801', '6335', '7839', '4687', 'k', '2457', 'L', 'O', '9919', '5539', '7339', 't']

SOLUTION:
1965c3281