C1111233131211111211113313331333133313331122212113313113313232233322231   >>    C111123313121111121111331333133313331333112221211331311331323223332223   <<    C1111233131211111211113313331333133313331122212113313113313232233322233   >>      C1111233131211111211113313331333133313331122212113313113313232233322232   >>