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:
2, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

Ex Output:
50469468Iz9007s


Ex Input:
8, 12, ['K', 'x', 'a', 'A', '6203', '117', '1007', '6063', '569', '9809', '9097', 'w', '3939', 'l', 'V']

Ex Output:
w790990899653606


Ex Input:
11, 17, ['k', 'i', 'N', 'X', '2197', '2209', 'H', 'F', '1543', 'R', 'X', 'D', '2983', 'l', 'x', '9163', 'Z', '3743', 'P', '8789', '1541', '9665', 'C', 'W', '7263', '91', 'a']

Ex Output:

Z3619xl3892DX