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:
5, 9, ['g', 'B', '7695', 'X', 'h', 'A', '693', 'x', 'Q', 'l', 'Q', '9223', 'y', 'a', 'q']
answer:
Qx396Ah


question:
1, 5, ['3155', '5437', '1383', 'L', 'a']
answer:
aL383173455513


question:
5, 7, ['2751', 'm', '9279', '8171', '509', '5307', 'f', 'x', 'R', 'I', 'I', 'v', 'V', 'T', '7047', '7547', 'L', 'y', '989', 'B']
answer:

f7035905