C111123313331323113313331333133313231323133312111112111113331311331333132331321   >>    C11112331333132311331333133313331323132313331211111211111333131133133313233132   <<    C111123313331323113313331333133313231323133312111112111113331311331333132331323   >>      C111123313331323113313331333133313231323133312111112111113331311331333132331322   >>