C1212121231123232233131323223313233313233313223313233313231313231321   >>    C121212123112323223313132322331323331323331322331323331323131323132   <<    C1212121231123232233131323223313233313233313223313233313231313231323   >>      C1212121231123232233131323223313233313233313223313233313231313231322   >>