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: 4, 5, ['S', 'S', 'L', '7199', '3259', '8515', '8657', '8201', 'V']

SOLUTION: 95239917

PROBLEM: 7, 8, ['U', 't', '8289', '9391', '1751', 'Y', '9319', 'A', 'Q', 'd', 'B', '2521', '2455']

SOLUTION: A9139

PROBLEM: 13, 19, ['883', '2695', '3275', '6947', '9895', 'r', 'W', 'P', 'y', '8219', 'u', '6883', 'i', 'd', 'S', 'L', '2627', 'm', 's', 'f', 'B', 'z', '1', '2317', '4841', 'v', '8349']

SOLUTION:
sm7262LSdi