C1111233131211111211113313331333133313232321333133313121133112112131   >>    C111123313121111121111331333133313331323232133313331312113311211213   <<    C1111233131211111211113313331333133313232321333133313121133112112133   >>      C1111233131211111211113313331333133313232321333133313121133112112132   >>