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:
3, 4, ['2419', '643', '8177', '7291', '561', '6529', '4101', 'u', '6445']

Ex Output:
19277718


Ex Input:
1, 5, ['d', 'p', 'B', 'i', '5865', '4569']

Ex Output:
5685iBpd


Ex Input:
1, 6, ['5441', 'W', 'h', 'W', 'w', '4775', 'Z', '6487', 'b']

Ex Output:

5774wWhW1445