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: 3, 7, ['u', '1307', 'F', '8027', 'r', '4559', 'F', 'm', '9805', '5063']

SOLUTION: F9554r7208F

PROBLEM: 4, 9, ['d', '1057', '5737', '6925', '6365', 'y', 'w', '6535', 'P', 'F']

SOLUTION: P5356wy56365296

PROBLEM: 6, 13, ['2517', '2397', '9233', '4359', '421', '9565', '7405', 'u', '4323', '6833', '3151', 'h', '8619', '7269', '9739', 'Y', '8683']

SOLUTION:
9168h151333863234u50475659