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-rw-r--r--src/group.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/group.js b/src/group.js
index ba5e1a0..d52707b 100644
--- a/src/group.js
+++ b/src/group.js
@@ -25,7 +25,7 @@ class Group {
}
}
-let groups = new Map();
+const groups = new Map();
function buildGroups(students) {
for (const student of students) {