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:
7, 8, ['8275', 'o', 'f', '6403', '7399', 'M', 'E', '7879', 'e', 'L', 'F', '2019']

Ex Output:
9787E


Ex Input:
4, 16, ['M', '1253', 'L', '1997', 'E', 'u', '4953', '1627', '4497', '1839', 'M', 's', '9821', '9159', '845', '6189', 'F', 'G', 'E', '2303', '503']

Ex Output:
981654895191289sM9381794472613594uE7991


Ex Input:
5, 29, ['I', 'N', '7751', 'y', 'S', '7515', '1395', 'I', '4133', 'C', '7499', 'H', 'P', 'W', '3319', '6191', 'h', '5987', '3083', 'N', '6083', '8791', '3137', '1457', '4819', '1325', '8455', 'M', '6955']

Ex Output:

5596M5548523191847541731319783806N38037895h19169133WPH9947C3314I59315157S