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:
8, 16, ['7751', 'Q', '9819', 'k', 'g', 'y', 'W', 'I', '6371', '9859', 'f', '7055', 's', 'I', 'W', '3029']

Ex Output:
9203WIs5507f95891736I


Ex Input:
3, 6, ['643', 'X', 'F', '7453', '8495', '7943']

Ex Output:
349759483547F


Ex Input:
6, 6, ['9493', 'a', 'A', '1453', 'f', '4939', '5537', '5463', 'e', '1473', 'k', 'D', '1593', 'E', 'A', '749', '6545']

Ex Output:

9394