C111123313331323113313331333133313231323133312111112111112323223313331323223311   >>    C11112331333132311331333133313331323132313331211111211111232322331333132322331   <<    C111123313331323113313331333133313231323133312111112111112323223313331323223313   >>      C111123313331323113313331333133313231323133312111112111112323223313331323223312   >>