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: 18, 19, ['M', 'v', 'g', 'F', 'l', 'I', 'b', 'Y', '245', 'm', 'K', 'A', 'w', '2785', '6643', 'X', '2179', '4907', '8707', 'B', 'Y']

49078707