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: 7, 12, ['H', '1425', 'v', 'f', 'b', 't', '4291', '7649', 'R', '2983', '1473', 'H', 'f']

42917649R29831473H