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:
20, 26, ['9693', 'i', '8753', 'f', '9131', 'v', '2831', '1541', 's', '8307', '373', 's', 'z', '4929', 'I', '741', 'K', '7767', '2557', 'f', '887', 'g', '779', 'k', '5967', '4947', '2373', '7251', '8841', '3277']

Ex Output:
74947695k977g788f


Ex Input:
4, 12, ['I', 'G', 'u', 'S', '9615', 't', 'p', 'P', 'R', 'v', '8819', '5379', 'I', '1165', '4545', '3117', '1577', 'y', 'W', 'R', 'O']

Ex Output:
97359188vRPpt5169S


Ex Input:
1, 11, ['8789', 'E', '9395', '221', '1717', 'X', '5745', 'r', '8679', 'T', '2361', '1403', 'y', 'g', '3449']

Ex Output:

1632T9768r5475X71711225939E9878