diff --git a/src/common/vectorize.rs b/src/common/vectorize.rs
index 210ecbd..ca7177a 100644
--- a/src/common/vectorize.rs
+++ b/src/common/vectorize.rs
@@ -30,3 +30,18 @@ pub fn split_inputs(input: Vec<String>, re: &str) -> Vec<Vec<String>> {
 
     result
 }
+
+pub fn convert_num(input: Vec<Vec<String>>) -> Vec<Vec<i32>> {
+    input
+        .into_iter()
+        .map(|a| {
+            a
+                .into_iter()
+                .map(|b| {
+                    b
+                        .trim()
+                      .parse::<i32>()
+                        .expect("Invalid numeric value in input!")
+                }).collect()
+        }).collect()
+}
diff --git a/src/day09/mod.rs b/src/day09/mod.rs
index eed78a7..ef4c54c 100644
--- a/src/day09/mod.rs
+++ b/src/day09/mod.rs
@@ -1,4 +1,4 @@
-use crate::common::{read_file, split_inputs, split_lines};
+use crate::common::{convert_num, read_file, split_inputs, split_lines};
 
 pub fn main() {
     let name = "day09";
@@ -7,8 +7,11 @@ pub fn main() {
     let content = read_file(name);
     let lines = split_lines(&content);
     let input = split_inputs(lines, &r"\s+");
+    let sequences = convert_num(input);   
     
-    for value in &input[0] {
-        print!("{value}, ");
-    }
+    let sum_input_0: i32 = sequences[0]
+        .clone()
+        .into_iter()
+        .sum();
+    println!("Erste Summe: {sum_input_0}");
 }