C212212121212113313221323131323131323132322331323132233132333132333132211231   >>    C21221212121211331322132313132313132313232233132313223313233313233313221123   <<    C212212121212113313221323131323131323132322331323132233132333132333132211233   >>      C212212121212113313221323131323131323132322331323132233132333132333132211232   >>