instruction:
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.
question:
2, 3, ['G', 'G', '7823', '8645', 'k', '1369', '7495', 'V', '2195', 'x', '3061', 'k', '7539', 'H', '8197', 'S', '7969', '9259', 'j']
answer:
3287G


question:
3, 7, ['5115', '3679', '9619', '8895', 'S', 'T', '5735', 'H', 'a']
answer:
5375TS59889169


question:
2, 12, ['k', 'S', '1331', '9005', '6999', '4029', '255', '3513', '5443', 'v', 'R', 'C', 'r']
answer:

CRv344531535529204999650091331S