C313131323331311331322331322331311211331323331313331323223312311   >>    C31313132333131133132233132233131121133132333131333132322331231   <<    C313131323331311331322331322331311211331323331313331323223312313   >>      C313131323331311331322331322331311211331323331313331323223312312   >>