C1111233131211111211113313331333133313331122212113313113313231322122321   >>    C111123313121111121111331333133313331333112221211331311331323132212232   <<    C1111233131211111211113313331333133313331122212113313113313231322122323   >>      C1111233131211111211113313331333133313331122212113313113313231322122322   >>