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: 7, 21, ['r', '2585', 'G', 'd', 'N', 'w', '6313', '6181', 'E', '423', '547', '5657', '9587', '269', '9041', '7009', '43', '3645', '9967', 'v', '5649', 's', 'C', 'u', '8463', '4393', 'j', 'V', '5565']

63136181E42354756579587269904170094336459967v5649