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:
10, 13, ['D', 'A', '4221', '7301', '1937', 'r', '5105', 'q', 'F', 'j', '9441', '6391', '7081', 'l', '6569', 'i', '8871', '5985']

Ex Output:
180719361449j


Ex Input:
4, 4, ['339', '1345', '9749', '6877', 'b', 'K', 'f', '1443']

Ex Output:
7786


Ex Input:
16, 19, ['6463', 'u', '885', '3577', 'u', 'F', 'q', '1171', 'T', '9133', 's', 'q', 'o', '5357', 'z', '7481', 'R', '3529', '6923', '8053']

Ex Output:

32969253R1847