Eoin McDonnell warm-up sumbissions needed for week 4

[emberborja]

• [x] Day 16
  • [x] find-the-odd-int
• [x] Day 17
  • [x] create-phone-number
  • [x] house-numbers-sum
• [x] Day 18
  • [x] use-map
• [x] Day 19
  • [x] stop-spinning-words