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: 6, 20, ['K', 'B', '1687', '1287', 'm', 'S', '9905', 'e', '6203', 'u', 'r', '5059', '9355', 't', 'N', 'C', '3031', '8467', '5715', '331', 'C', '6683', '263', 'O', 'e', 'h', 'S']

S9905e6203ur50599355tNC303184675715331