C212313222213113313112113121111331333313331333133313223313331323223313123132211   >>    C21231322221311331311211312111133133331333133313331322331333132322331312313221   <<    C212313222213113313112113121111331333313331333133313223313331323223313123132213   >>      C212313222213113313112113121111331333313331333133313223313331323223313123132212   >>