C13132313123113313223313133313231133132333132311113313132322121   >>    C1313231312311331322331313331323113313233313231111331313232212   <<    C13132313123113313223313133313231133132333132311113313132322123   >>      C13132313123113313223313133313231133132333132311113313132322122   >>