C212212121212113313221323131323131323132322331323132233131331123232311   >>    C21221212121211331322132313132313132313232233132313223313133112323231   <<    C212212121212113313221323131323131323132322331323132233131331123232313   >>      C212212121212113313221323131323131323132322331323132233131331123232312   >>