C212212121212113313221323131323131323132322331323132233132313231321   >>    C21221212121211331322132313132313132313232233132313223313231323132   <<    C212212121212113313221323131323131323132322331323132233132313231323   >>      C212212121212113313221323131323131323132322331323132233132313231322   >>