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, 5, ['n', '8897', '6611', '2857', 'p']

Ex Output:
p758211667988


Ex Input:
2, 7, ['P', 'Q', 'i', '1593', 'M', '8577', 'd', 'Y']

Ex Output:
d7758M3951iQ


Ex Input:
3, 4, ['v', 'f', '2987', '7303', '15']

Ex Output:

30377892