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, 9, ['3441', 'a', 'o', 'B', 'e', 'u', 'B', 'Z', '1287', '323', '5849', 'F', '7917', '1023', '6323', 'A', 'v', '491', '6123', '5949', '1409', 'I', '6889']

Ex Output:
7821ZBueBoa


Ex Input:
2, 8, ['7283', '1463', 'A', '6121', 'H', '173', '8829', 'V']

Ex Output:
V9288371H1216A3641


Ex Input:
6, 6, ['X', 't', 'o', 'T', '5143', 'p', 'y', '2769', '3873', 'O']

Ex Output:

p