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, 11, ['X', '2085', 'N', 'v', '5217', '27', '8089', 'V', '5201', '911', '5343', 'X', 'X', 'U', '9441', 'W', '2931', 'z', 'M', 'Z', '4647', 'c', 'R', '9231']

SOLUTION: 34351191025V9808727125vN5802

PROBLEM: 1, 4, ['I', '5919', 'J', '6387']

SOLUTION: 7836J9195I

PROBLEM: 12, 15, ['M', 'k', 'E', 'w', 'D', 'g', 'Z', '1999', 'q', 'y', '7047', 'v', 'z', 'o', '6535', '2099', 'X', '773', '1139', 'f', '423', 'G', 'M', 'R', '1875', '1051', 'h', '9301', '7485']

SOLUTION:
5356ozv