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, 2, ['w', '5569', '6229', 'b']

SOLUTION: 9655

PROBLEM: 1, 2, ['3909', '5863', '707']

SOLUTION: 36859093

PROBLEM: 6, 28, ['M', '5569', 't', '2589', 'C', 'K', '3009', 'R', '2799', 'B', '2343', '6209', '2581', 'w', '5303', '959', '4783', '7051', '6627', 'D', '4569', '4025', 'd', 'c', '3363', 'h', 'w', '1663', 'm', 'd']

SOLUTION:
3661wh3633cd52049654D7266150738749593035w185290263432B9972R9003K