C212212121212113313221323131323132313132322331323132233131311311   >>    C21221212121211331322132313132313231313232233132313223313131131   <<    C212212121212113313221323131323132313132322331323132233131311313   >>      C212212121212113313221323131323132313132322331323132233131311312   >>