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, 1, ['9675', 'e', '4343', '8021']

SOLUTION: 5769

PROBLEM: 1, 4, ['6969', 'P', '8161', '6347', 'P', 'S', 'z']

SOLUTION: 74361618P9696

PROBLEM: 2, 8, ['Q', 't', '5665', '3493', '771', '1899', '4891', '9753', '5443']

SOLUTION:
35791984998117739435665t