C313131323331311331322331322331311211331323132311113313231333132313232313231221   >>    C31313132333131133132233132233131121133132313231111331323133313231323231323122   <<    C313131323331311331322331322331311211331323132311113313231333132313232313231223   >>      C313131323331311331322331322331311211331323132311113313231333132313232313231222   >>