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  balma, caverna, gruta Höhle cavern   caverne   caverna, gruta
  gruta Grotte grot, grotto haitzulo, haizpe, harpe, hartzulo grotte gruta gruta
caverna, gruta, oca caverna, cova Höhle cave haitzulo, haizpe, harpe, hartzulo, koba, kobazulo, leize caverne, grotte cafurna, caverna, cova, espenuca, furna, gruta, pala, palafurna caverna, cueva, gruta