C13132313123113313223313133313231133132333132322231333132322121121   >>    C1313231312311331322331313331323113313233313232223133313232212112   <<    C13132313123113313223313133313231133132333132322231333132322121123   >>      C13132313123113313223313133313231133132333132322231333132322121122   >>