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: 4, 12, ['S', '1783', 'd', '3489', '2291', '4757', 'b', '5761', 'Y', 'M', '6453', '2477', 'B', 'm', '6749', 'S', '3291', 'L', '8725', '8637', 'l', '1747']

SOLUTION: 77423546MY1675b757419229843

PROBLEM: 2, 11, ['G', 'z', 'w', 'C', 'h', '6193', 'T', 'r', 'f', 'h', 'p', 'R']

SOLUTION: phfrT3916hCwz

PROBLEM: 7, 8, ['4367', '4367', 'm', '5681', '931', '9039', '8313', '6335', 'w', 'd', 'V', '1741', '1703', 'I', 't', 'a', 'P', 'P', 'x']

SOLUTION:
53363138