C313131323331311331322331322331311211331323331322331323133313131221   >>    C31313132333131133132233132233131121133132333132233132313331313122   <<    C313131323331311331322331322331311211331323331322331323133313131223   >>      C313131323331311331322331322331311211331323331322331323133313131222   >>