C1212121231123232233131323223313233313231313331311331323331311321   >>    C121212123112323223313132322331323331323131333131133132333131132   <<    C1212121231123232233131323223313233313231313331311331323331311323   >>      C1212121231123232233131323223313233313231313331311331323331311322   >>