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:
6, 7, ['8123', 'G', '4941', 'Z', 'i', 'T', '3335']
answer:
5333T


question:
1, 7, ['P', 'h', '1443', 'b', 'K', '2641', '3831']
answer:
13831462Kb3441hP


question:
2, 10, ['3927', 'b', '3769', 'z', '4179', '8463', 'e', 'i', 'w', '969', '7107', '2883', '2007']
answer:

969wie36489714z9673b