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+// Example Baba Yaga Program
+// Demonstrates core language features
+
+// Variables and basic operations
+x : 42;
+y : x + 8;
+message : "Hello, Baba Yaga!";
+
+// Functions and currying
+add : a b -> a + b;
+multiply : a b -> a * b;
+addTen : add 10;
+
+// Higher-order functions with lists
+numbers : [1, 2, 3, 4, 5];
+doubled : map (x -> x * 2) numbers;
+evens : filter (x -> x % 2 = 0) doubled;
+sum : reduce (acc x -> acc + x) 0 evens;
+
+// Pattern matching
+classify : n ->
+  when n is
+    0 then "zero"
+    1 then "one"
+    Int then when (n > 10) is true then "big" _ then "small"
+    _ then "unknown";
+
+// Error handling with Result types
+safeDivide : a b ->
+  when b is
+    0 then Err "Division by zero"
+    _ then Ok (a / b);
+
+// Table (object) operations
+person : { name: "Alice", age: 30, city: "New York" };
+
+// Output results
+io.out "=== Baba Yaga Language Demo ===";
+io.out "";
+
+io.out "Basic values:";
+io.out x;
+io.out y;
+io.out message;
+
+io.out "";
+io.out "Function results:";
+io.out (addTen 5);
+io.out (multiply 6 7);
+
+io.out "";
+io.out "List operations:";
+io.out doubled;
+io.out evens;
+io.out sum;
+
+io.out "";
+io.out "Pattern matching:";
+io.out (classify 0);
+io.out (classify 15);
+io.out (classify 3);
+
+io.out "";
+io.out "Error handling:";
+result1 : safeDivide 10 2;
+result2 : safeDivide 10 0;
+io.out result1;
+io.out result2;
+
+io.out "";
+io.out "Table operations:";
+io.out person;
+
+io.out "";
+io.out "Demo complete!";