Thomas and friends

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Across
  1. 2. The Brown engine
  2. 4. The middle blue engine
  3. 6. The number 1
  4. 8. The small green engine
Down
  1. 1. The biggest blue engine
  2. 3. The only red engine
  3. 5. The dark green engine with the biggest number (12)
  4. 7. The biggest green engine