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, 3, ['4541', 'B', '9655', '8453', 'r', 'i', 'P']

SOLUTION: 5569B

PROBLEM: 3, 6, ['643', 'X', 'F', '7453', '8495', '7943']

SOLUTION: 349759483547F

PROBLEM: 1, 7, ['8567', 'v', 'y', 'P', '4619', 'v', '4647', 'W', 'W', 'Q', '4697', '8003', '2147', 'T', '6449', 'Z', 'T', '8703', 'H', 'd', 'z', '6885', 'h', '9267', 'y', '2313', '7455', 'I', '8867', 'B']

SOLUTION:
7464v9164Pyv7658