Right result: [[32,2,256,64],[128,32,16,32],[16,16,0,0],[0,0,0,0]] Fail: checkio([[[32,2,256,64],[128,32,16,32],[16,16,0,0],[0,0,0,0]],"up"])

I think need '2' at index 16 ?

URL from: http://www.checkio.org/mission/simple2048/solve/ HTTPUSERAGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 1092) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.137 Safari/537.36