1 #!/usr/bin/env python2 # encoding: utf-83 t = int(raw_input())4 for i in range(t):5     n,k = [int(x) for x in raw_input().split(‘ ‘)]6     lst = [int(x) for x in raw_input().split(‘ ‘)]7     ans = max(sum((lst*2)[j:j+k]) for j in range(n))8     print ans