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: 6, 8, ['u', 'y', '5599', 'i', 'Z', 'F', '8907', 'A', 'l', '8821', 'B', 'G', 'd']

SOLUTION: A7098F

PROBLEM: 26, 26, ['6889', '1843', '3667', 'I', '7035', '5757', 'L', '4247', '1471', 'z', '8037', 'Z', '6985', '3539', '2133', 'g', 'z', '885', 'R', 'c', '9571', '2733', 'a', 'C', '8691', '9527']

SOLUTION: 7259

PROBLEM: 6, 6, ['s', '9381', '3579', '2261', '177', 'u', 'F', 's', '8909', '7627', 'o', '237']

SOLUTION:
u