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, 3, ['4541', 'B', '9655', '8453', 'r', 'i', 'P']

Ex Output:
5569B


Ex Input:
2, 18, ['8671', 'd', '5109', '1915', 'h', '2777', '3087', '9861', '8597', 'P', '4505', 'j', 'M', 'O', 's', 'Q', '2703', 'X', 'l', 'g', '1801']

Ex Output:
X3072QsOMj5054P7958168978037772h51919015d


Ex Input:
1, 24, ['I', '7325', '7739', 'U', 'm', 'j', '8659', '8909', '789', '7039', '8393', '8777', '5733', 'B', 'c', '9849', 'g', '6983', '7169', '1261', '7719', 'j', 'b', 'n', 'h', '1867']

Ex Output:

nbj9177162196173896g9489cB337577783938930798790989568jmU93775237I