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: 11, 23, ['F', 'F', 'D', 'R', 'L', 'Z', 'D', 'B', 'I', 'J', 'U', 'L', '2811', '7157', 'j', 'o', '5377', '207', '6579', 'U', '2909', '7277', '9513']

UL28117157jo53772076579U290972779513