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: 1, 3, ['9937', 'F', 'g', 'B', 'M', 'x', 'n', 'V', '4241', 'Z']

SOLUTION: gF7399

PROBLEM: 4, 9, ['9213', '2865', '1347', 'Y', 'A', '6261', 'E', 'w', 'r', 'B', 'j', '9157', 'r', '485', '8951']

SOLUTION: rwE1626AY

PROBLEM: 11, 12, ['1917', 'p', 'e', 'c', '2741', '3321', 'c', '7333', '7771', '8611', '7571', '6805', 'G', 'O', 'X', '1155', '4605', '901', 'i', 'E']

SOLUTION:
50861757