diff --git a/headFirst/args/data.txt b/headFirst/args/data.txt
new file mode 100644
index 0000000..cf0389a
--- /dev/null
+++ b/headFirst/args/data.txt
@@ -0,0 +1,6 @@
+1
+2
+3
+4
+5
+6
\ No newline at end of file
diff --git a/headFirst/args/go.mod b/headFirst/args/go.mod
new file mode 100644
index 0000000..1da823a
--- /dev/null
+++ b/headFirst/args/go.mod
@@ -0,0 +1,3 @@
+module main
+
+go 1.24.5
diff --git a/headFirst/args/main b/headFirst/args/main
new file mode 100755
index 0000000..c45b6c6
Binary files /dev/null and b/headFirst/args/main differ
diff --git a/headFirst/args/main.go b/headFirst/args/main.go
new file mode 100644
index 0000000..1726a55
--- /dev/null
+++ b/headFirst/args/main.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"main/sub"
+	"os"
+)
+
+func jp (mylist ...int) {
+	for _,i := range mylist {
+		fmt.Print(i," ")
+	}
+}
+
+func main() {
+	args := os.Args[1]
+	res := sub.Kek(args)
+	fmt.Println(res)
+
+	jp(1,2,3,4)
+}
+
diff --git a/headFirst/args/sub/sub.go b/headFirst/args/sub/sub.go
new file mode 100644
index 0000000..1093167
--- /dev/null
+++ b/headFirst/args/sub/sub.go
@@ -0,0 +1,20 @@
+package sub
+
+import (
+	"bufio"
+	"os"
+	"strconv"
+)
+
+func Kek(fileName string) []int {
+	var seg []int
+	counter := 0
+	file,_ := os.Open(fileName)
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		mid,_ := strconv.ParseInt(scanner.Text(),0,0)
+		seg = append(seg,int(mid))
+		counter++
+	}
+	return seg
+}
\ No newline at end of file
diff --git a/headFirst/fourth/data.txt b/headFirst/fourth/data.txt
new file mode 100644
index 0000000..6275511
--- /dev/null
+++ b/headFirst/fourth/data.txt
@@ -0,0 +1,6 @@
+1
+2
+3
+5
+6
+7
diff --git a/headFirst/fourth/fourth b/headFirst/fourth/fourth
new file mode 100755
index 0000000..4402983
Binary files /dev/null and b/headFirst/fourth/fourth differ
diff --git a/headFirst/fourth/go.mod b/headFirst/fourth/go.mod
new file mode 100644
index 0000000..e3a981f
--- /dev/null
+++ b/headFirst/fourth/go.mod
@@ -0,0 +1,3 @@
+module fourth
+
+go 1.24.5
diff --git a/headFirst/fourth/main.go b/headFirst/fourth/main.go
new file mode 100644
index 0000000..ff08523
--- /dev/null
+++ b/headFirst/fourth/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+	"fourth/sub"
+)
+
+
+func main() {
+	res := sub.Kek("data.txt")
+	fmt.Println(res)
+}
\ No newline at end of file
diff --git a/headFirst/fourth/sub/sub.go b/headFirst/fourth/sub/sub.go
new file mode 100644
index 0000000..1093167
--- /dev/null
+++ b/headFirst/fourth/sub/sub.go
@@ -0,0 +1,20 @@
+package sub
+
+import (
+	"bufio"
+	"os"
+	"strconv"
+)
+
+func Kek(fileName string) []int {
+	var seg []int
+	counter := 0
+	file,_ := os.Open(fileName)
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		mid,_ := strconv.ParseInt(scanner.Text(),0,0)
+		seg = append(seg,int(mid))
+		counter++
+	}
+	return seg
+}
\ No newline at end of file
diff --git a/headFirst/third/go.mod b/headFirst/third/go.mod
index bae85df..527b3cc 100644
--- a/headFirst/third/go.mod
+++ b/headFirst/third/go.mod
@@ -1,3 +1,5 @@
 module third
 
 go 1.24.5
+
+require github.com/headfirstgo/greeting v0.0.0-20190504033635-66e7507184ee // indirect
diff --git a/headFirst/third/go.sum b/headFirst/third/go.sum
new file mode 100644
index 0000000..def1916
--- /dev/null
+++ b/headFirst/third/go.sum
@@ -0,0 +1,2 @@
+github.com/headfirstgo/greeting v0.0.0-20190504033635-66e7507184ee h1:Hb9bIxuBldEBCjyExf8LAWdR3V7ikknAHVGfAsP7pA0=
+github.com/headfirstgo/greeting v0.0.0-20190504033635-66e7507184ee/go.mod h1:VREJ5Jpvj59lYxvs0Uzt8BtzUg05tqSxp+H67JHSBn8=
diff --git a/headFirst/third/main.go b/headFirst/third/main.go
index 789f654..be529df 100644
--- a/headFirst/third/main.go
+++ b/headFirst/third/main.go
@@ -1,8 +1,28 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+	"third/sub"
+
+	"github.com/headfirstgo/greeting"
+)
+
+func hi(input *string) string {
+	if strings.TrimSpace(*input) == "kek" {
+		return ""
+	}
+	*input = "func"
+	return fmt.Sprintf("Hi from  %s",*input)
+}
 
 func main() {
-	lol := 0.4444
-	fmt.Printf("\nthis is float %#v\n",lol)
+	input := "lol"
+	fmt.Printf("Got from func: %s\n",hi(&input))
+	fmt.Printf("Original one: %s\n\n\n\n",input)
+
+	sub.Hello()
+	sub.Hi()
+
+	greeting.Hello()
 }
\ No newline at end of file
diff --git a/headFirst/third/sub/sub.go b/headFirst/third/sub/sub.go
new file mode 100644
index 0000000..a263cd7
--- /dev/null
+++ b/headFirst/third/sub/sub.go
@@ -0,0 +1,12 @@
+package sub
+
+import "fmt"
+
+func Hi() {
+	fmt.Println("Hi from sub pkg")
+}
+
+// Hello() just prints out another version of greeting
+func Hello() {
+	fmt.Println("Hello from sub package!!")
+}