C11111211113313112113313331333131133133313331333132233133313231323321   >>    C1111121111331311211331333133313113313331333133313223313331323132332   <<    C11111211113313112113313331333131133133313331333132233133313231323323   >>      C11111211113313112113313331333131133133313331333132233133313231323322   >>