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: 1, 18, ['M', 'K', 'K', '3631', 't', 'J', 'd', '1309', 'Z', '2125', 'h', '9031', '1855', 'y', 'c', '7961', 'm', '209', 'y']

MKK3631tJd1309Z2125h90311855yc7961m209