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, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

SOLUTION: 50469468Iz9007s

PROBLEM: 1, 2, ['N', '1117', '1343']

SOLUTION: 7111N

PROBLEM: 12, 27, ['6959', 'v', 'i', '5633', '3059', 'K', 'K', 'G', '4489', 'O', 'S', 'e', 'F', 'n', '7603', 'N', 'E', '3345', 'l', '3959', '9839', '4369', '6415', '8281', '9913', 'B', '2413']

SOLUTION:
3142B319918285146963493899593l5433EN3067nFe