Singular and plural forms

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Across
  1. 2. Singular for mice
  2. 3. Plural for beach
  3. 4. Singular for classes
  4. 6. Plural for fairy
  5. 8. Plural for game
Down
  1. 1. Plural for fox
  2. 3. Plural for bird
  3. 4. Plural for chair
  4. 5. Singular for sheep
  5. 7. Singular for men