C212212121212113313221323131323132313132322331323132233132323211321   >>    C21221212121211331322132313132313231313232233132313223313232321132   <<    C212212121212113313221323131323132313132322331323132233132323211323   >>      C212212121212113313221323131323132313132322331323132233132323211322   >>