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:
1, 3, ['a', '8801', '2379']
answer:
97321088a


question:
2, 3, ['T', '9003', '3731', '287', '7101', 'm', '2147', '6123', '6319']
answer:
13733009


question:
5, 6, ['M', '6157', 'l', '7263', '2007', '3861', 'M', '2785', 'x', '7449']
answer:

16837002