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:
15, 16, ['1107', '1863', 'L', '6929', '9633', '9399', '4479', 'V', 'o', 'x', '1065', '7955', 'i', '7413', '6237', 'S', '1461', '8481', '7143', 's', 'U', 'd']

Ex Output:
S7326


Ex Input:
1, 2, ['4857', '9647']

Ex Output:
74697584


Ex Input:
11, 17, ['r', 'U', '1975', '9675', 'M', 'd', 'n', '7291', '1693', '4059', '9787', 'M', '7055', 'g', 'm', '3683', '917']

Ex Output:

7193863mg5507M7879