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, 3, ['2217', 'i', '6309', '6299', 'z']

SOLUTION: 9036i7122

PROBLEM: 2, 3, ['6875', 'D', 'r']

SOLUTION: rD

PROBLEM: 2, 6, ['7323', 'O', '2047', 'c', '7475', 'M', '1525', '8919', 'x', 'M', 'K', '5415', 'r', '8461', 'l', '7819', 'e', '6987', '2089', '6449']

SOLUTION:
M5747c7402O