C121212123112323223313132322331323133313233313232233132213231321   >>    C12121212311232322331313232233132313331323331323223313221323132   <<    C121212123112323223313132322331323133313233313232233132213231323   >>      C121212123112323223313132322331323133313233313232233132213231322   >>