C313131323331311331322331322331311211331323331313331323331323223313112131   >>    C31313132333131133132233132233131121133132333131333132333132322331311213   <<    C313131323331311331322331322331311211331323331313331323331323223313112133   >>      C313131323331311331322331322331311211331323331313331323331323223313112132   >>