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, 2, ['L', '7723']

SOLUTION: 3277L

PROBLEM: 3, 5, ['C', '4345', 'T', 't', 'U', 'p']

SOLUTION: UtT

PROBLEM: 6, 8, ['W', 'l', 'H', 'o', 'N', 'l', 'a', 'j', 'Z', 'z', 't', 'S', 'i', '7009', 'V', 'V', '843', '137', '4883']

SOLUTION:
jal