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.

[Q]: 4, 5, ['B', 'H', 'y', 'y', 'K']
[A]: Ky


[Q]: 8, 19, ['r', '7451', 'X', 'l', 'S', 'v', '4807', '4851', '8849', '3993', 'w', 'Z', '1419', '9185', 'N', '2285', '13', 'm', 'd', 'Y', 'j']
[A]: dm315822N58199141Zw399394881584


[Q]: 8, 19, ['h', 't', 'D', 'J', '4381', 'H', '5951', '4073', 'a', 'h', 'c', '3507', '1125', 'o', 'V', '4865', '735', '9519', '7403', '7035', 'Z', '8741']
[A]:
304791595375684Vo52117053cha3704