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:
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:
10, 10, ['Z', 'Z', '2205', '7113', 'G', 'k', '973', 'I', 'n', '415', '1505']

Ex Output:
514


Ex Input:
3, 8, ['O', '4401', 'q', 'N', 'C', '305', 'U', 'B', '2487', 'r', '107', 'S', '227', '7291', 'U', 'X', '9269', '2095', 'G', 'W', 'q', 'Z']

Ex Output:

BU503CNq