C212212121212113313221323131323132313132322331323132233131133131323222321   >>    C21221212121211331322132313132313231313232233132313223313113313132322232   <<    C212212121212113313221323131323132313132322331323132233131133131323222323   >>      C212212121212113313221323131323132313132322331323132233131133131323222322   >>