Liên quan 12340 Stalle 1234 1230 1240 12440 Koshigayaboshi 1 + 2 + 3 + 4 + ⋯ 12342 Kudohmichiko 1 − 2 + 3 − 4 + ⋯ 12310 Londontario 12341 Calevoet