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: 17, 21, ['t', '3639', 'f', '4245', '5321', '555', '4459', 'o', 'o', 'q', 'n', '8305', '3887', '8209', '7735', 'q', 'O', 'Y', 'l', '2623', 'b', '479', 'C', '3961', 'g', 'b', 'j', 'P', 'E']

OYl2623b