C212212121212113313221323131323132313132322331323132233132321123221   >>    C21221212121211331322132313132313231313232233132313223313232112322   <<    C212212121212113313221323131323132313132322331323132233132321123223   >>      C212212121212113313221323131323132313132322331323132233132321123222   >>