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, 11, ['B', 'V', 'S', '7211', 'U', '7773', '4803', 'z', '9371', 'l', 'S', '1559', 'l', '9203', '9919', 'M']

SOLUTION: Sl1739z30843777U1127S

PROBLEM: 2, 2, ['1467', 'm']

SOLUTION: m

PROBLEM: 6, 8, ['6919', 'k', 'r', 'B', '329', 'L', 'd', 'X', 'Q']

SOLUTION:
XdL