Detailed Instructions: 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: 9, 21, ['4921', 'J', 'G', '3389', 'G', 'E', 'b', 'H', '4803', '827', 'p', '3329', 'A', 'U', '4127', 'N', '4391', 'Y', '1107', 'H', 't', '4887', '961', '7091', '4629', 'I', 'U', '1175', '9421']
A:
tH7011Y1934N7214UA9233p7283084