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, 5, ['C', '4345', 'T', 't', 'U', 'p']

Ex Output:
UtT


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

Ex Output:
577559191464579234430269659


Ex Input:
2, 2, ['q', 'w', 'D', 'A', '3751', 'G', '2419', 'V']

Ex Output:

w