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: 9, 12, ['5543', 'h', 's', 'f', '1047', '4389', 'X', '67', '1265', '257', 'c', 'u']

1265257cu