C1313231312311331322331313331323113313233313232222331323133313223311231   >>    C131323131231133132233131333132311331323331323222233132313331322331123   <<    C1313231312311331322331313331323113313233313232222331323133313223311233   >>      C1313231312311331322331313331323113313233313232222331323133313223311232   >>