C212212121212113313221323131323131323132322331323132233133112312311   >>    C21221212121211331322132313132313132313232233132313223313311231231   <<    C212212121212113313221323131323131323132322331323132233133112312313   >>      C212212121212113313221323131323131323132322331323132233133112312312   >>