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, 9, ['C', 'V', '9945', 'W', 'R', 't', '471', 'Y', 'F', '2445', 'd', 'R', 'l', 'f', '5041', 'm', '7347', 'j', '6257']

Ex Output:
FY174tRW5499VC


Ex Input:
5, 7, ['6005', 'y', '5057', '7865', '2845', '101', 'M', 'd']

Ex Output:
M1015482


Ex Input:
3, 18, ['287', '1179', '4531', 'H', 'c', '1057', '7889', 'x', 'B', '7389', 'C', 'w', '1823', 'c', 'k', '5917', 'U', '6473', 'Q', 'E']

Ex Output:

3746U7195kc3281wC9837Bx98877501cH1354