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: 2, 21, ['9179', 'R', 'F', 'i', 'f', '9379', 'A', 'y', 'm', '2807', 'n', 'o', '4117', 'T', 'L', 'x', 'e', 'z', 'k', 'y', '5423', '6131', 'n', 'q', '279', '9973', '4931', '2451', 'S', '213']

RFif9379Aym2807no4117TLxezky5423