C212212121212113313221323131323131323132322331323132233132333132313133313113121   >>    C21221212121211331322132313132313132313232233132313223313233313231313331311312   <<    C212212121212113313221323131323131323132322331323132233132333132313133313113123   >>      C212212121212113313221323131323131323132322331323132233132333132313133313113122   >>