diff --git a/src/main.rs b/src/main.rs
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,11 @@
 use std::env;
-use regexp::Regexp;
+use regexp::RegexpNFA;
 
 fn test() {
 	let tests = ["", "a", "ab", "aabb", "abab", "abcd", "abcbcdbcd"];
 	for pattern in ["a(b|c)", "a*b*", "(ab)*", "a((bc)*d)*", "(a|b)*a(a|b)(a|b)(a|b)", "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"] {
 		println!("# {pattern}");
-		let r = match Regexp::new(&pattern.to_string()) {
+		let r = match RegexpNFA::new(&pattern.to_string()) {
 			Ok(r1) => r1.determinize().reduce().normalize(),
 			Err(e) => {
 				println!("{e}");
@@ -24,7 +24,7 @@ fn main() {
 	match args[1].as_str() {
 		"test" => test(),
 		"match" => {
-			let r = match Regexp::new(&args[2].to_string()) {
+			let r = match RegexpNFA::new(&args[2].to_string()) {
 				Ok(r1) => r1.determinize().reduce().normalize(),
 				Err(e) => {
 					panic!("ERROR: {e}");
@@ -33,13 +33,13 @@ fn main() {
 			println!("{}", r.eval(args[3].to_string()));
 		},
 		"compare" => {
-			let r1 = match Regexp::new(&args[2].to_string()) {
+			let r1 = match RegexpNFA::new(&args[2].to_string()) {
 				Ok(r) => r.determinize().reduce().normalize(),
 				Err(e) => {
 					panic!("ERROR: {e}");
 				}
 			};
-			let r2 = match Regexp::new(&args[3].to_string()) {
+			let r2 = match RegexpNFA::new(&args[3].to_string()) {
 				Ok(r) => r.determinize().reduce().normalize(),
 				Err(e) => {
 					panic!("ERROR: {e}");
@@ -48,7 +48,7 @@ fn main() {
 			println!("{}", r1.find_distinguishing_string(&r2).unwrap_or("None".to_string()));
 		},
 		s => {
-			println!("An unknown command: \"{s}\". Use \"match\" or \"test\".")
+			println!("An unknown command: \"{s}\". Use \"match\", \"compare\" or \"test\".")
 		}
 	}
 }