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, 10, ['V', '7549', '4639', '3825', '4619', 'w', '7667', '557', 'L', 'z', '1883', 'k', 'j', 'o', 'p', '3945', 'u', 'l', '5637']

Ex Output:
zL7557667w9164528393649457


Ex Input:
6, 18, ['7925', 'Q', '6779', '425', '8043', 'R', 'H', 'n', 'R', '4255', 'G', 'p', '5441', 'M', 'u', '8797', '2863', 'N', 'W', 'l', '7147', 'M', '5575', '7705', '4261', '4563', 'v', '955']

Ex Output:
N36827978uM1445pG5524RnHR


Ex Input:
4, 7, ['7627', 'J', 'k', 'C', 'P', '1161', '2225', 'b', 'W', 'O', 'b', '9301', '1171', 'A', 'c', 'y', 'w', '7841', '2787', 'x', '665', '1985', '7043']

Ex Output:

52221611PC