diff --git a/iOS Algs.playground/Contents.swift b/iOS Algs.playground/Contents.swift
new file mode 100644
index 0000000..1a3a106
--- /dev/null
+++ b/iOS Algs.playground/Contents.swift	
@@ -0,0 +1,32 @@
+import UIKit
+
+func tr(from: String, to: String, test: String) -> String {
+    var fromArray = Array(from.characters)
+    var toArray = Array(to.characters)
+    let testArray = Array(test.characters)
+    var testDictionary: [String : String] = [:]
+    var stupidNewArray: [String] = []
+    var result: String = ""
+    if fromArray.count != toArray.count {
+        return "Bad from/to string"
+    }
+    for char in 0..<fromArray.count {
+        testDictionary[String(fromArray[char])] = String(toArray[char])
+    }
+    
+    for char in testArray {
+        if testDictionary.keys.contains(String(char)) {
+            stupidNewArray.append(testDictionary[String(char)]!)
+        }
+        else {
+            stupidNewArray.append(String(char))
+        }
+    }
+    for letter in stupidNewArray {
+        result += letter
+    }
+    return result
+}
+tr(from: "1a", to: "a1", test: "aax11")
+
+//tr("1a","a1","aax11") => "11xaa"
diff --git a/iOS Algs.playground/contents.xcplayground b/iOS Algs.playground/contents.xcplayground
new file mode 100644
index 0000000..5da2641
--- /dev/null
+++ b/iOS Algs.playground/contents.xcplayground	
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='5.0' target-platform='ios'>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>
\ No newline at end of file
diff --git a/iOS Algs.playground/playground.xcworkspace/contents.xcworkspacedata b/iOS Algs.playground/playground.xcworkspace/contents.xcworkspacedata
new file mode 100644
index 0000000..919434a
--- /dev/null
+++ b/iOS Algs.playground/playground.xcworkspace/contents.xcworkspacedata	
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
diff --git a/iOS Algs.playground/playground.xcworkspace/xcuserdata/margaretikeda.xcuserdatad/UserInterfaceState.xcuserstate b/iOS Algs.playground/playground.xcworkspace/xcuserdata/margaretikeda.xcuserdatad/UserInterfaceState.xcuserstate
new file mode 100644
index 0000000..251fd8c
Binary files /dev/null and b/iOS Algs.playground/playground.xcworkspace/xcuserdata/margaretikeda.xcuserdatad/UserInterfaceState.xcuserstate differ