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: 4, 18, ['7881', 'X', 'P', 'S', 'b', 'u', 'W', '5181', '8535', 'U', 'D', '2377', '6055', 'M', 'Z', '5867', '4973', '7759', '5275', 'L', 'j', 'm', '7259', 'U']

SbuW51818535UD23776055MZ586749737759