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, 9, ['7139', 'Z', '4407', '9791', 'F', '139', '4927', 's', '4721', 'Y']

1394927s4721