diff --git "a/Retos/Reto #9 - HETEROGRAMA, ISOGRAMA Y PANGRAMA [F\303\241cil]/swift/juanjoseen.swift" "b/Retos/Reto #9 - HETEROGRAMA, ISOGRAMA Y PANGRAMA [F\303\241cil]/swift/juanjoseen.swift"
new file mode 100644
index 0000000000..9fec39e710
--- /dev/null
+++ "b/Retos/Reto #9 - HETEROGRAMA, ISOGRAMA Y PANGRAMA [F\303\241cil]/swift/juanjoseen.swift"	
@@ -0,0 +1,53 @@
+import Foundation
+
+extension String {
+    var esHeterograma: Bool {
+        for (key, value) in conteo() {
+            if value > 1 {
+                return false
+            }
+        }
+        return true
+    }
+    
+    var esIsograma: Bool {
+        var total: Int = -1
+        var conteo: [String: Int] = conteo()
+        for (key, value) in conteo {
+            if total < 0 {
+                total = value
+            } else {
+                if value != total {
+                    return false
+                }
+            }
+        }
+        return true
+    }
+    
+    var esPangrama: Bool {
+        let lower: String = self.lowercased()
+        for char in Array("abcdefghijklmnopqrstuvwxyz") {
+            if !lower.contains(where: { $0 == char }) {
+                return false
+            }
+        }
+        return true
+    }
+    
+    private func conteo() -> [String: Int] {
+        var dic: [String: Int] = [:]
+        for char in Array(self) {
+            let key: String = String(char)
+            var value: Int = dic[key] ?? 0
+            dic[key] = value + 1
+        }
+        
+        return dic
+    }
+}
+
+print("yuxtaponer".esHeterograma)
+print("papa".esIsograma)
+print("Benjamín pidió una bebida de kiwi y fresa. Noé, sin vergüenza, la más exquisita champaña del menú.".esPangrama)
+