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:
3, 9, ['Y', '9075', '2327', '1643', '655', '935', 'a', 'j', 'm']
answer:
mja53955634617232


question:
2, 7, ['9065', 'Q', 'L', 'U', '6289', '1915', '1747', 'a', 'N', '9259', '4713', '7959']
answer:
747151919826ULQ


question:
6, 7, ['3507', 'w', 'V', '5719', 'p', 'C', 'd', 'j', '3239', '3677', 'w', '1431', 'k', '8187']
answer:

dC