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.

Ex Input:
3, 9, ['7671', '575', 'l', '989', '7015', 'X', 'x', '3543', '3771', '905', '3815', 's']

Ex Output:
17733453xX5107989l


Ex Input:
4, 10, ['L', '6587', 'q', '9569', '6203', '443', '2975', '4641', '9195', '5775', 'y', 'K', '9665']

Ex Output:
577559191464579234430269659


Ex Input:
2, 14, ['1957', 'S', 'w', '5587', '97', 'S', 'g', 'K', '2821', '7385', '4567', '3817', 'k', '399', '8179', 'D', '8365', '5715', '6179', '9533', 'r', 'L', 'X', '2031']

Ex Output:

993k7183765458371282KgS797855wS