diff --git a/src/cli/commands/day004.rs b/src/cli/commands/day004.rs
index 8f1a4c9..7d7129c 100644
--- a/src/cli/commands/day004.rs
+++ b/src/cli/commands/day004.rs
@@ -1,8 +1,55 @@
-use crate::cli::PathBuf;
 use crate::util::read_lines;
+use std::fs::File;
+use std::io::{BufReader, Lines};
+use std::path::PathBuf;
+
+fn part1(lines: Lines<BufReader<File>>) {
+    let mut full_containt: u32 = 0;
+    let mut overlapping: u32 = 0;
+    for line in lines {
+        let temp_line = line;
+        let mut team: Vec<u32> = Vec::new();
+        temp_line
+            .unwrap()
+            .split(",")
+            .collect::<Vec<&str>>()
+            .iter()
+            .for_each(|s| {
+                s.split("-")
+                    .into_iter()
+                    .for_each(|s| team.push(s.parse::<u32>().unwrap()))
+            });
+        let t1_start: &u32 = team.get(0).unwrap();
+        let t1_end: &u32 = team.get(1).unwrap();
+        let t2_start: &u32 = team.get(2).unwrap();
+        let t2_end: &u32 = team.get(3).unwrap();
+        if (t1_start >= t2_start && t1_end <= t2_end)
+            || (t2_start >= t1_start && t2_end <= t1_end)
+            || (t1_start == t2_end &&t2_start == t2_end)
+            || (t1_end == t2_end && t2_start == t2_end)
+        {
+            println!(
+                "Gruppe full: {:?}-{:?}, {:?}-{:?}",
+                t1_start, t1_end, t2_start, t2_end
+            );
+            //println!("{:?}", team);
+            full_containt += 1;
+        } else if (t1_start < t2_end && t1_end < t2_end) || (t2_start >= t1_start) {
+            println!(
+                "Gruppe part: {:?}-{:?}, {:?}-{:?}",
+                t1_start, t1_end, t2_start, t2_end
+            );
+            overlapping += 1;
+        }
+    }
+
+    println!("full {:?}", full_containt);
+    println!("part {:?}", overlapping);
+    println!("total {:?}", full_containt + overlapping);
+}
 
 pub fn subcmd_day004(file: &Option<PathBuf>, alt: &bool) {
     if let Ok(lines) = read_lines(file.as_ref().unwrap().as_path()) {
-        
+        part1(lines);
     }
 }