C212212121212113313221323131323131323132322331323132233132333131232211   >>    C21221212121211331322132313132313132313232233132313223313233313123221   <<    C212212121212113313221323131323131323132322331323132233132333131232213   >>      C212212121212113313221323131323131323132322331323132233132333131232212   >>