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: 8, 9, ['s', 'X', '6737', 'M', 'm', 'N', 'a', 'Q', 't']

SOLUTION: tQ

PROBLEM: 5, 9, ['7453', '7415', 's', 'O', '1161', 'G', 'N', '5925', '3367', 'f', '7739', 'b', 'y', 'o', '2431', 'Y']

SOLUTION: 76335295NG1611

PROBLEM: 8, 10, ['k', 'q', 'o', 'r', 's', 'E', '1307', 'm', '7721', 'X', 'j', '2845', '6577', 'v']

SOLUTION:
X1277m