diff --git a/src/main.rs b/src/main.rs
index 0c25b5a..127e390 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,19 +2,33 @@
 fn main() {
     
     let args = vec![
-        "string1",
-        "string2",
+        "(){}[]",
+        "([{}])",
+        "(}",
+        "[(])",
+        "[({})](]",
     ];
 
     println!();
 
     for arg in args {
-        println!("{}",func(&arg));
+        println!("{:8} => {}",arg, valid_braces(arg));
     };
 
     println!();
 }
 
-fn func(s: &str) -> String {
-    s.into()
+fn valid_braces(s: &str) -> bool {
+    let mut v = vec![];
+
+    for c in s.chars() {
+        match c {
+            '('|'{'|'[' => v.push(c),
+            ')' => if v.pop() != Some('(') { return false },
+            '}' => if v.pop() != Some('{') { return false },
+            ']' => if v.pop() != Some('[') { return false },
+             _  => {},
+        }
+    }
+    v.is_empty()
 }