diff --git a/src/prob6.rs b/src/prob6.rs
index 1d12c54..a713d5e 100644
--- a/src/prob6.rs
+++ b/src/prob6.rs
@@ -17,7 +17,7 @@ use fancy_regex::Regex;
 /// ```
 fn begin_datagram(datagram: &str) {
     let mut letters = HashSet::<char>::new();
-    let mut primary_iter = datagram.chars().fuse();
+    let primary_iter = datagram.chars().fuse();
     let mut motif_iter = primary_iter.clone();
     while letters.len() < 4 {
         if let Some(tmp) = motif_iter.next() {
@@ -32,9 +32,21 @@ fn begin_datagram(datagram: &str) {
 
 pub fn solve_part1(content: &str) -> i32 {
     let _content = content;
-    return match Regex::new(r"^.*(.).*\1.*$") {
+    return match Regex::new(r"^(?:([A-Za-z])(?!.*\1))*$") {
         Ok(_reg) => {
             println!("Regex is built.");
+            match _reg.find(_content) {
+                Ok(matches) => {
+                    if let Some(yay) = matches {
+                        println!("{}", yay.as_str());
+                    } else {
+                        println!("Snif no match :(");
+                    }
+                }
+                Err(err) => {
+                    eprintln!("{err}")
+                }
+            }
             0
         }
         Err(err) => {