C1212121231123232233131323223313233313233313223313231311331311321   >>    C121212123112323223313132322331323331323331322331323131133131132   <<    C1212121231123232233131323223313233313233313223313231311331311323   >>      C1212121231123232233131323223313233313233313223313231311331311322   >>