C1111233131211111211113313331333133313232321333133313331323222233312321   >>    C111123313121111121111331333133313331323232133313331333132322223331232   <<    C1111233131211111211113313331333133313232321333133313331323222233312323   >>      C1111233131211111211113313331333133313232321333133313331323222233312322   >>