- name: sample1
  in: |
    2 3
  out: |
    1 2
    1 3
    2 3

- name: sample2
  in: |
    3 5
  out: |
    1 2 3
    1 2 4
    1 2 5
    1 3 4
    1 3 5
    1 4 5
    2 3 4
    2 3 5
    2 4 5
    3 4 5
