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, 20, ['1259', 'm', 'i', '9437', 'u', '463', 'G', '5055', '4663', 'P', 'S', 'l', 'C', 'v', 'J', 'U', '9827', '1431', '5507', '469', 'N', 't', '6127']

G50554663PSlCvJU982714315507469