C1111233131211111211113313331333133313232321333133313331211331311211   >>    C111123313121111121111331333133313331323232133313331333121133131121   <<    C1111233131211111211113313331333133313232321333133313331211331311213   >>      C1111233131211111211113313331333133313232321333133313331211331311212   >>