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: 2, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

SOLUTION: 50469468Iz9007s

PROBLEM: 2, 12, ['f', '1687', '819', 'N', 'w', '6089', '6725', 'p', '8625', '5327', 'r', '8103', 'd', '1441', 'v', 'k', '3407', '5891', 'X', '6419', 'e']

SOLUTION: 3018r72355268p52769806wN9187861

PROBLEM: 17, 23, ['6259', 'S', 'h', '3221', 'G', '9921', 'E', '8067', 'X', 'l', '9947', 'L', 'I', 'S', 'Z', 'D', 'c', '5429', 'W', 'T', 'd', '8031', 'y', 'U']

SOLUTION:
y1308dTW9245c