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, 5, ['3349', '9445', '703', 'k', '3191', '4473', 'K', '3417', '8305', '8781', 'K', 'v', 'O', 'Y', '4375', 'o']

Ex Output:
1913k


Ex Input:
5, 6, ['u', 'O', 'l', '9119', 'P', '6983', 'H', '6701']

Ex Output:
3896P


Ex Input:
1, 3, ['s', 'v', '6451', 'n', 'd', 'w', 'g', '7541', '6709']

Ex Output:

1546vs