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, 11, ['N', '5989', '9485', '1955', '4841', '8403', 'f', 'M', '3261', '9581', '8083', '5201', '6391', 'h', 'C', 'O', '6361', '4033', '9121', '9825']

Ex Output:
380818591623Mf30481484559158499895


Ex Input:
2, 5, ['f', 'd', '2691', 't', 'u']

Ex Output:
ut1962d


Ex Input:
10, 16, ['7031', 'Y', '1841', 'W', 'x', '4791', '1815', 'A', '9709', '4723', 'u', 'n', '3621', 'r', '6959', '5265', 'o', '3733', '7121', '7049']

Ex Output:

56259596r1263nu3274