diff --git a/Cargo.lock b/Cargo.lock
index 6123be5..586e353 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anstream"
 version = "0.6.13"
@@ -50,6 +59,12 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "anyhow"
+version = "1.0.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0952808a6c2afd1aa8947271f3a60f1a6763c7b912d210184c5149b5cf147247"
+
 [[package]]
 name = "clap"
 version = "4.5.4"
@@ -100,7 +115,9 @@ checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 name = "forge-clean-log"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "clap",
+ "regex",
 ]
 
 [[package]]
@@ -109,6 +126,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "memchr"
+version = "2.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.79"
@@ -127,6 +150,35 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "regex"
+version = "1.10.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c117dbdfde9c8308975b6a18d71f3f385c89461f7b3fb054288ecf2a2058ba4c"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "adad44e29e4c806119491a7f06f03de4d1af22c3a680dd47f1e6e179439d1f56"
+
 [[package]]
 name = "strsim"
 version = "0.11.0"
diff --git a/Cargo.toml b/Cargo.toml
index 30234ab..801c93c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0"
 clap = { version = "4.5", features = [ "derive" ]}
+regex = "1.10"
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..a08aff9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,22 @@
-fn main() {
-    println!("Hello, world!");
+use clap::Parser;
+use std::{fs::read_to_string, path::PathBuf};
+
+#[derive(clap::Parser)]
+struct Cli {
+    #[clap(short, long, help = "The input file")]
+    input: PathBuf,
+}
+
+fn main() -> anyhow::Result<()> {
+    let cli = Cli::parse();
+    let re = regex::Regex::new(r"^(.*)\s+(.*)$")?;
+    for line in read_to_string(cli.input)?.lines() {
+        if let Some(caps) = re.captures(line) {
+            println!("{:5} {}", &caps[1], &caps[2]);
+        } else {
+            println!("{}", line);
+        }
+        println!("{}", line);
+    }
+    Ok(())
 }