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: 2, 2, ['w', '5569', '6229', 'b']

SOLUTION: 9655

PROBLEM: 2, 9, ['g', '309', 'x', '3537', '5995', 'K', '6951', 'x', 'b', '3171', '9079', '7597']

SOLUTION: bx1596K59957353x903

PROBLEM: 2, 23, ['699', '7915', 'V', 'J', 'W', 'h', '8183', '6755', 'e', '19', 'm', 'I', 'l', '4267', '9667', '3721', 'b', '8573', '921', '335', 'v', 'H', '9819', '3685', 'Y', '9771', '1031', 'P', 'a']

SOLUTION:
9189Hv5331293758b127376697624lIm91e55763818hWJV5197