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: 9, 20, ['F', 'P', 'H', '4379', '107', 'W', 'D', 'Y', 's', 'N', '5691', 'D', '2161', '3575', '9851', 'R', 'Y', 's', '377', '827']

sN5691D216135759851RYs377827