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, 5, ['M', 'H', '7813', '6149', 'u', 't', '3643', '5901', 'A', 'g', '3929', 'V']
answer:
u94163187HM


question:
1, 8, ['7991', '7999', '8575', '4211', '6003', '2483', '7877', '7249', 'K', '21']
answer:
94277787384230061124575899971997


question:
2, 8, ['4419', 'f', 'p', '435', '8449', 'J', '1539', '1595', 'T', '7785', 'q', 'E', 'A', 'Q', '4471', 'W', 'M', '1133', 'e', 'U', 'm', '8265', 't', '6503', 'Z', 'k', '3873', '7763', '6581']
answer:

59519351J9448534pf


