C212212121212113313221323131323131323132322331323132233132333132322133311231   >>    C21221212121211331322132313132313132313232233132313223313233313232213331123   <<    C212212121212113313221323131323131323132322331323132233132333132322133311233   >>      C212212121212113313221323131323131323132322331323132233132333132322133311232   >>