Divide the nouns in two groups.

• Группы
  • Regular plurals
  • Irregular plurals
• Варианты
  • horse
  • mouse
  • deer
  • lion
  • foot
  • child
  • woman
  • building
  • bus
  • man
  • tooth
  • fish
  • ox
  • person
  • phone
  • eraser
  • student
  • apple
  • mother
  • floor