diff --git a/src/main.rs b/src/main.rs
--- a/src/main.rs
+++ b/src/main.rs
@@ -18,6 +18,10 @@ struct Asterisk {
 	content: Box<dyn Token>
 }
 
+struct Plus {
+	content: Box<dyn Token>
+}
+
 struct Chain {
 	content: Vec<Box<dyn Token>>
 }
@@ -60,6 +64,28 @@ impl Token for Asterisk {
 	}
 }
 
+impl Token for Plus {
+	fn list_first(&self) -> Vec<usize> {
+		return self.content.list_first();
+	}
+
+	fn list_last(&self) -> Vec<usize> {
+		return self.content.list_last();
+	}
+
+	fn list_neighbours(&self) -> Vec<(usize, usize)> {
+		let mut res = self.content.list_neighbours();
+
+		for x in self.list_last() {
+			for y in self.list_first() {
+				res.push((x, y));
+			}
+		}
+
+		return res;
+	}
+}
+
 impl Token for Chain {
 	fn list_first(&self) -> Vec<usize> {
 		let mut res = Vec::new();
@@ -136,6 +162,11 @@ fn parse(pattern: &String, offset: usize
 				res.push(Box::new(Asterisk{content: token}));
 				i += 1;
 			}
+			'+' => {
+				let token = res.pop().unwrap();
+				res.push(Box::new(Plus{content: token}));
+				i += 1;
+			}
 			c => {
 				res.push(Box::new(Symbol{position: i+offset, value: c}));
 				i += 1;
@@ -202,7 +233,7 @@ impl Regexp {
 
 fn main() {
 	let tests = ["a", "ab", "aabb", "abab", "abcd", "abcbcdbcd"];
-	for pattern in ["a*b*", "(ab)*", "a((bc)*d)*"] {
+	for pattern in ["a*b*", "a+b+", "(ab)*", "(ab)+", "a((bc)*d)*"] {
 		println!("# {pattern}");
 		let r = Regexp::new(&pattern.to_string());
 		for &t in tests.iter() {