C13132313123113313223313133313231133132333132311113313233313221221   >>    C1313231312311331322331313331323113313233313231111331323331322122   <<    C13132313123113313223313133313231133132333132311113313233313221223   >>      C13132313123113313223313133313231133132333132311113313233313221222   >>