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: 8, 18, ['W', 'E', '3643', '8327', '9621', 'N', 'r', 'H', 'T', 'M', 'D', 'C', 't', 'w', '4011', 'd', 'Q', '6627', '2247', '9269', '3949', '6181', 'm', 'O', '3779', 'K']

HTMDCtw4011dQ6627