  500  iex -S mix run
  501  sort -n list1.csv
  502  sort -k2 -n list1.csv
  503  sort -k2 -n list1.csv |head
  504  sort -r -k2 -n list1.csv |head
  505  sort -r -k2 -n list1.csv |head |cut -f1-3
  506  sort -r -k2 -n list1.csv |head -100 |cut -f1-3
  507  sort -r -k2 -n list1.csv |head -100 |cut -f1-3 > top100.csv
  508  git add top100.csv 
  509  history >ttxt
