C11111333133313232233133313331333133313331311331333133313311211111111232321   >>    C1111133313331323223313331333133313331333131133133313331331121111111123232   <<    C11111333133313232233133313331333133313331311331333133313311211111111232323   >>      C11111333133313232233133313331333133313331311331333133313311211111111232322   >>