C212212121212113313221323131323133313132333132322132322331312312111   >>    C21221212121211331322132313132313331313233313232213232233131231211   <<    C212212121212113313221323131323133313132333132322132322331312312113   >>      C212212121212113313221323131323133313132333132322132322331312312112   >>