C313131323331311331322331322331311211331323331313331323331323132322132313232311   >>    C31313132333131133132233132233131121133132333131333132333132313232213231323231   <<    C313131323331311331322331322331311211331323331313331323331323132322132313232313   >>      C313131323331311331322331322331311211331323331313331323331323132322132313232312   >>