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, 3, ['2047', 'R', '6885', '1243', 'Z']

SOLUTION: 5886

PROBLEM: 4, 17, ['897', 'R', 'L', '201', 'Z', 'o', 'A', '9367', 'E', 'G', '6653', 'i', 'V', 'F', '9433', 'G', '8073', '5739', '7009']

SOLUTION: 3708G3349FVi3566GE7639AoZ102

PROBLEM: 18, 26, ['6097', 'J', 'F', '3153', '3441', '731', 'Y', 'b', 't', 'I', '1235', '9173', '3499', 'h', '9919', '647', 'S', '2917', 'U', 'e', 'y', '7125', 'A', 'A', 'M', '657', '7681']

SOLUTION:
756MAA5217yeU7192