C1313231312311331322331313331323113313233313232222331323331323221221   >>    C131323131231133132233131333132311331323331323222233132333132322122   <<    C1313231312311331322331313331323113313233313232222331323331323221223   >>      C1313231312311331322331313331323113313233313232222331323331323221222   >>