C1111233131211111211113313331333133313331311211331333133313331333132233231211   >>    C111123313121111121111331333133313331333131121133133313331333133313223323121   <<    C1111233131211111211113313331333133313331311211331333133313331333132233231213   >>      C1111233131211111211113313331333133313331311211331333133313331333132233231212   >>