249期：<<13/15/19/21/31/32/34/35/37/38/39/42/43/44/46/49>>开：31中
250期：<<03/08/10/14/15/16/23/24/25/27/32/33/36/41/45/49>>开：42错
251期：<<02/06/07/11/15/16/23/24/27/29/30/31/32/39/40/48>>开：13错
252期：<<05/06/07/08/09/14/18/20/25/26/28/39/42/45/46/48>>开：08中
253期：<<01/02/10/11/22/25/26/31/37/38/40/41/42/45/48/49>>开：？？