diff --git a/guess/Cargo.toml b/collatz/Cargo.toml
old mode 100755
new mode 100644
similarity index 90%
rename from guess/Cargo.toml
rename to collatz/Cargo.toml
index fb1ec2c..88598e0
--- a/guess/Cargo.toml
+++ b/collatz/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "hello"
+name = "collatz"
 version = "0.1.0"
 edition = "2021"
 
diff --git a/collatz/src/main.rs b/collatz/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/collatz/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/guess/src/main.rs b/guess/src/main.rs
deleted file mode 100755
index 48c93b1..0000000
--- a/guess/src/main.rs
+++ /dev/null
@@ -1,19 +0,0 @@
-use std::io;
-use std::io::Write;
-
-fn main() {
-    let mut theguess_tm = String::new();
-
-    println!("Hello noob");
-    print!("Guess a number or something lol: ");
-
-    io::stdout()
-        .flush()
-        .expect("couldn't flush ?");
-
-    io::stdin()
-        .read_line(&mut theguess_tm)
-        .expect("Stinky computer lol ur mom");
-
-    println!("ur guess was: {}", theguess_tm);
-}