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: 1, 18, ['y', '3835', 'Z', '6157', 'x', '6107', 'R', '5373', 'c', 'x', '6299', 'W', '1041', 'M', 'y', '1063', '1031', 'a']

y3835Z6157x6107R5373cx6299W1041My10631031a