C21221212121211331313233313131133132333132313223313113313231323123223321   >>    C2122121212121133131323331313113313233313231322331311331323132312322332   <<    C21221212121211331313233313131133132333132313223313113313231323123223323   >>      C21221212121211331313233313131133132333132313223313113313231323123223322   >>