diff --git a/src/modes/pair.rs b/src/modes/pair.rs
index 271ed91..4e33cae 100644
--- a/src/modes/pair.rs
+++ b/src/modes/pair.rs
@@ -55,7 +55,7 @@ use std::fmt::{Display, Formatter, Result};
 
 impl Display for Pair {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {
-        write!(f, "Pair({}, {})", self.0, self.1)
+        write!(f, "Pair[{}, {}]", self.0, self.1)
     }
 }
 
diff --git a/src/modes/single.rs b/src/modes/single.rs
index 4a787b6..fbeb230 100644
--- a/src/modes/single.rs
+++ b/src/modes/single.rs
@@ -35,7 +35,7 @@ impl Hand for Single {
 use std::fmt::{Display, Formatter, Result};
 impl Display for Single {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result {
-        write!(f, "Single({})", self.0)
+        write!(f, "Single[{}]", self.0)
     }
 }