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:
1, 7, ['j', 'P', '5633', 'g', 'z', '3163', '8849', '1267', '1157', '6987', '9743']

Ex Output:
94883613zg3365Pj


Ex Input:
3, 8, ['w', '7571', 'o', '235', 's', 'n', '3941', '6357', '3251', 'G', '5961', 'z', 'N', '5029', '7589', '3993', '5087', '6351', '5799', '1943', '7661', 'S']

Ex Output:
75361493ns532o


Ex Input:
1, 2, ['4857', '8715']

Ex Output:

51787584