Definition: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to concatenate all elements of A from the ith element to the jth element, and print the resultant 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.
Input: 5, 11, ['7891', 'v', '1679', '5795', 'm', 'F', 'K', 'C', 'h', 'A', '7897', 'n', 'k', 'l', '3811', 'O', '6369', '6735', 'k', 'u', '8959', 'b', '1471', '9891', 'R']

mFKChA7897