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:
1, 7, ['B', '707', '7101', 'l', 'i', 'Q', 'e', '9437', 'i', '4709', 'w', 't', '1459', 'A', 'E', '923']

Ex Output:
eQil1017707B


Ex Input:
3, 7, ['5115', '3679', '9619', '8895', 'S', 'T', '5735', 'H', 'a']

Ex Output:
5375TS59889169


Ex Input:
1, 5, ['a', '457', 'j', '927', '5207', 'a', 'G', 'S', 'd', '7447']

Ex Output:

7025729j754a