C313131323331311331322331322331311211331323331313331323133112121   >>    C31313132333131133132233132233131121133132333131333132313311212   <<    C313131323331311331322331322331311211331323331313331323133112123   >>      C313131323331311331322331322331311211331323331313331323133112122   >>