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: 30, 30, ['t', 'W', 'P', '7193', '913', 'j', 'Y', '9535', '7771', 'R', '9275', '7115', '3433', '5279', 'T', '8899', '9497', 'U', '3461', '1753', 'k', 'T', '7899', '6963', '9271', '9173', '3357', '3521', '7397', 'r']

SOLUTION: r

PROBLEM: 1, 5, ['E', 'h', 'N', '9931', 'F', '9367', 'N', 'K', 'Y', '1449', '8503', '9277', 'k', '9627', 'Q', 'v']

SOLUTION: F1399NhE

PROBLEM: 13, 18, ['v', '9633', 'z', '8419', 'l', 's', '6093', '4793', '5083', '195', '341', '9047', '2789', '5213', 'y', 'E', '7931', 'u', 'y', '493', '7989', '4841', 'v', '2941', '2699', '8533', 'o', 'h']

SOLUTION:
u1397Ey31259872