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:
4, 4, ['675', 'e', 'A', 'H', 'O', 'E', 'g', 'j', 'j', '5167', '2367', 'u', 'E', '753', 'M']

Ex Output:
H


Ex Input:
7, 22, ['3371', '4741', 's', '7429', 'z', '639', 'Q', '5679', 'e', '8039', '5323', 'C', '2901', '7629', 'D', 'y', 'C', '4333', 'P', 'v', 'A', '8171']

Ex Output:
1718AvP3334CyD92671092C32359308e9765Q


Ex Input:
1, 15, ['7633', 'H', '4621', '5863', 'U', 'M', '5025', 'D', '4527', '4879', '4779', 'M', 'r', '1679', '6575', 'C', 'e', 'Q', 'P']

Ex Output:

57569761rM977497847254D5205MU36851264H3367