C212212121212113313221323131323132313132322331323132233132313232221   >>    C21221212121211331322132313132313231313232233132313223313231323222   <<    C212212121212113313221323131323132313132322331323132233132313232223   >>      C212212121212113313221323131323132313132322331323132233132313232222   >>