diff --git a/src/string/MyStr_strict.rs b/src/string/MyStr_strict.rs
new file mode 100644
index 0000000..8a70cc1
--- /dev/null
+++ b/src/string/MyStr_strict.rs
@@ -0,0 +1,14 @@
+enum Status {
+    BUISY,
+    FREE,
+    DELETED,
+}
+
+const SIZE: usize = 15;
+
+pub struct Str {
+    _data: Vec<char>,
+    _stats: Vec<Status>,
+    _size: usize,
+    _capacity: usize,
+}