TASK DEFINITION: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
PROBLEM: 6, 10, ['W', '4485', 'x', '4885', '779', '5681', '5085', '3523', '2869', '3817', 'D', 'J', '5781', '4703', '8409', '7397', '1743', 'n', 'O', 'O', 'I', '2341', 'd']

SOLUTION: 38172869352350855681

PROBLEM: 3, 5, ['q', 'G', '9871', '3427', 'Q', '1993', 'H']

SOLUTION: Q34279871

PROBLEM: 5, 12, ['W', 'Y', '6067', 'o', '8583', 'o', 'P', '5259', 'y', 'p', '7201', 'O', '8137', 'R', '6717', 'A', '9213', '5315', 'v']

SOLUTION:
O7201py5259Po8583