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: 4, 16, ['O', 'x', 'E', 'z', 'q', '2235', 'j', 'Q', '9655', '6887', '7651', '4695', 'p', 'M', '7975', 'p', 'u', '7275', 'y', 'w', '9677', 'I', '8609', '3333', '1835', '7137', '2509', '6157', '1805']

SOLUTION: p5797Mp5964156778865569Qj5322qz

PROBLEM: 4, 13, ['6993', '5601', 'n', 'J', 'E', 'M', 'd', 'T', 'V', 'C', '4969', 'J', 'F']

SOLUTION: FJ9694CVTdMEJ

PROBLEM: 17, 23, ['6595', 'k', 'k', '2565', 'U', 't', 'E', '1081', '1815', '7523', '953', '4435', '7025', 'L', '4357', '7849', '7959', '1663', 'R', 'X', '4397', '5427', '7727']

SOLUTION:
727772457934XR36619597