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, 5, ['l', '7281', 'I', '9805', '9063', 'T', 'f', 'k', 'X', 'D', 'j', '9739']

SOLUTION: 36095089I

PROBLEM: 1, 2, ['e', 'F']

SOLUTION: Fe

PROBLEM: 3, 28, ['8681', 'b', '5797', 'x', 'C', 'D', 'm', '3425', '9697', '3457', 'M', '8655', 'x', '7869', 'h', '1123', '3873', 'N', '1237', 's', 'V', '1047', 'b', '2075', 'i', '637', '6409', 'n', 'G']

SOLUTION:
n9046736i5702b7401Vs7321N37833211h9687x5568M754379695243mDCx7975