C212212121212113313221323131323131323132322331323132233132312311311   >>    C21221212121211331322132313132313132313232233132313223313231231131   <<    C212212121212113313221323131323131323132322331323132233132312311313   >>      C212212121212113313221323131323131323132322331323132233132312311312   >>