C212212121212113313221323131323131323132322331323132233132322331323123121   >>    C21221212121211331322132313132313132313232233132313223313232233132312312   <<    C212212121212113313221323131323131323132322331323132233132322331323123123   >>      C212212121212113313221323131323131323132322331323132233132322331323123122   >>