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:
3, 15, ['5807', 'M', 'A', 'm', '4557', 'P', 'y', '2895', 'K', 'K', '5379', '2367', 'M', '8653', '3847', 'D', '7725', '6571', 'L', '2011', 'h']

Ex Output:
74833568M76329735KK5982yP7554mA


Ex Input:
6, 23, ['813', '4817', '7933', '4081', 'J', 'g', '1547', 'Y', '7747', 't', '3133', '1013', 'a', 'Z', 'b', 'F', '5347', '2121', '3073', 'O', 'F', 'l', '7473', 'k']

Ex Output:

3747lFO370312127435FbZa31013313t7477Y7451g