C1111233131211111211113313331333133313133313231211111232313223311   >>    C111123313121111121111331333133313331313331323121111123231322331   <<    C1111233131211111211113313331333133313133313231211111232313223313   >>      C1111233131211111211113313331333133313133313231211111232313223312   >>