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:
16, 23, ['8677', '5311', '9815', 'v', 'x', 'q', 'F', '5221', '7309', '5201', '6021', 'w', 'e', 'q', '7021', '8889', '4377', 'w', '2731', '5969', 'J', '1001', '637', 'r', 'b', '409', 'l', '391']

Ex Output:
7361001J96951372w77349888


Ex Input:
10, 13, ['v', '9787', '3803', 'P', 'M', '7127', '7845', '6369', 'u', '8715', 'I', '7491', '6593', '459', '1747', 'L']

Ex Output:
39561947I5178


Ex Input:
4, 6, ['k', 'l', '4583', '331', 't', '6205', 'e', 'm']

Ex Output:

5026t133