diff --git a/names.csv b/names.csv
new file mode 100644
index 00000000..1599273f
--- /dev/null
+++ b/names.csv
@@ -0,0 +1,2000 @@
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+William,20,USA
+Emma,43,France
+David,40,Brazil
+David,56,Canada
+Michael,22,Brazil
+James,21,USA
+Sophia,18,China
+Ava,60,Brazil
+John,41,Canada
+Ava,23,Canada
+Olivia,31,France
+Olivia,37,China
+Sophia,37,Germany
+Sophia,53,Japan
+John,38,Germany
+Emma,59,Canada
+William,37,France
+William,20,Brazil
+James,49,USA
+Sophia,63,Brazil
+David,53,France
+John,61,USA
+Jane,45,Australia
+James,32,USA
+Sophia,62,France
+Jane,40,China
+James,52,India
+Emma,56,Canada
+Sophia,23,Brazil
+Olivia,21,Germany
+John,47,Brazil
+Emma,63,Brazil
+Olivia,43,China
+David,57,UK
+Emma,26,France
+Olivia,24,Canada
+David,25,USA
+John,21,UK
+Emma,46,USA
+David,60,Japan
+Emma,40,Japan
+Olivia,29,UK
+Olivia,62,Germany
+Emma,56,Brazil
+James,22,Canada
+David,25,India
+John,45,Australia
+Jane,36,Brazil
+Ava,19,Australia
+Jane,25,Brazil
+Jane,36,France
+Michael,24,India
+John,27,Japan
+Emma,62,UK
+Sophia,44,Japan
+James,58,China
+James,35,Japan
+Olivia,47,Germany
+Emma,20,China
+Jane,23,China
+Emma,20,France
+Emma,44,Canada
+Jane,18,USA
+James,49,USA
+William,22,Germany
+Emma,25,India
+Jane,19,Canada
+Emma,48,China
+William,38,China
+James,53,India
+Sophia,31,USA
+Ava,18,Canada
+William,45,France
+James,47,Australia
+John,56,China
+James,40,Canada
+David,52,Brazil
+William,47,France
+Sophia,59,Canada
+John,47,France
+Sophia,60,China
+Ava,32,India
+David,33,France
+Olivia,62,Canada
+Michael,25,UK
+Emma,35,India
+David,31,UK
+Sophia,41,China
+Emma,64,France
+John,33,Canada
+Michael,19,China
+Ava,33,Japan
+Sophia,64,Brazil
+Sophia,42,China
+Olivia,18,Canada
+William,42,China
+William,56,Germany
+John,18,China
+Jane,51,Germany
+William,51,China
+Ava,56,France
+Michael,37,UK
+Jane,62,India
+Michael,53,Australia
+Olivia,35,India
+William,46,Canada
+Olivia,46,Australia
+Ava,23,France
+Emma,49,USA
+Sophia,40,India
+James,29,Brazil
diff --git a/week-046.md b/week-046.md
index d15fed08..4fd34dc6 100644
--- a/week-046.md
+++ b/week-046.md
@@ -180,3 +180,45 @@ print(n)
 Now do the same with unix pipes, `cat /etc/hidden/data.txt | grep ^h | wc -l`
 
 
+## [DAY-339] unix
+
+> generate a file with few thousand name,age,country entries, I used chatgpt to generate it, you can get it from: [names.csv](names.csv), and upload it to the server.
+
+```
+Ava,51,UK
+William,49,USA
+Michael,24,Australia
+Ava,20,USA
+Emma,48,USA
+James,64,Brazil
+David,34,Japan
+Olivia,46,India
+Michael,62,Canada
+Ava,41,India
+Ava,63,Brazil
+Emma,65,Australia
+James,18,Japan
+Olivia,26,UK
+Michael,34,Canada
+John,53,Brazil
+Michael,35,Germany
+Emma,52,Brazil
+William,46,Brazil
+James,61,USA
+...
+```
+
+Write a program that prints only the names column, use the python cheatsheet to see how to use the 'split' method of the string object.
+
+```
+f = open("names.csv","r")
+lines = f.readlines()
+n = 0
+for l in lines:
+    s = l.split(",")
+    print(s[0])
+f.close()
+```
+
+> now use `cat names.csv | cut -f 2 -d ,` to show an example of using the `cut` command.
+