C1111233131211111211113313331333133313331122212111111331323221121   >>    C111123313121111121111331333133313331333112221211111133132322112   <<    C1111233131211111211113313331333133313331122212111111331323221123   >>      C1111233131211111211113313331333133313331122212111111331323221122   >>