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, ['4101', '9767', 'q', 'Z', '6853', '3643']

SOLUTION: q76791014

PROBLEM: 15, 16, ['4531', 'a', 'I', 'W', '1071', '1301', 'v', 's', '3521', '7203', '1157', 'w', '7201', 'a', 'I', 'z', 'V', 'X', 'j']

SOLUTION: zI

PROBLEM: 2, 23, ['S', '3819', '223', 'w', '6657', 'j', 'M', '2613', 'F', '1821', 'p', '6555', 'e', 'X', 'G', 'K', 'Y', 'A', '5993', 'b', 'I', '1947', 'g', 'A', 'T', '6013', '1479', '1425']

SOLUTION:
g7491Ib3995AYKGXe5556p1281F3162Mj7566w3229183