diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 50e5f0e..86d8ac2 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -8,6 +8,7 @@ Every name is sorted in alphabetically.
 - [danhenriquesc](https://github.com/danhenriquesc)
 - [hundredrab](https://github.com/hundredrab)
 - [jackey8616](https://github.com/jackey8616)
+- [mateusguerra](https://github.com/mateusguerra)
 - [mirianashvili](https://github.com/mirianashvili)
 - [Obsinqsob01](https://github.com/Obsinqsob01)
 - [PyPatel](https://github.com/PyPatel)
diff --git a/README.md b/README.md
index 13dd444..dacdf77 100644
--- a/README.md
+++ b/README.md
@@ -125,7 +125,7 @@ https://www.hackerrank.com/contests/code-and-the-curious/challenges
 | Alternating Characters | ✓ | | |
 | String Construction | | | ✓ |
 | Ashton and String | | ✓ | |
-| Two Strings |  | | ✓ |
+| Two Strings | ✓ | | ✓ |
 
 **Sorting**
 
diff --git a/algorithms/strings/two_strings.py b/algorithms/strings/two_strings.py
new file mode 100644
index 0000000..68e50c0
--- /dev/null
+++ b/algorithms/strings/two_strings.py
@@ -0,0 +1,27 @@
+#!/bin/python3
+
+import os
+
+# Complete the twoStrings function below.
+def twoStrings(s1, s2):
+    intersection = set(s1) & set(s2)
+    if len(intersection) > 0:
+        return "YES"
+    return "NO"
+    
+    
+if __name__ == '__main__':
+    fptr = open(os.environ['OUTPUT_PATH'], 'w')
+
+    q = int(input())
+
+    for q_itr in range(q):
+        s1 = input()
+
+        s2 = input()
+
+        result = twoStrings(s1, s2)
+
+        fptr.write(result + '\n')
+
+    fptr.close()
diff --git a/data_structures/arrays/left_rotation.php b/data_structures/arrays/left_rotation.php
new file mode 100644
index 0000000..7d27c80
--- /dev/null
+++ b/data_structures/arrays/left_rotation.php
@@ -0,0 +1,29 @@
+<?php
+
+// Complete the rotLeft function below.
+function rotLeft($a, $d) {
+    $shift = array_splice($a, 0, $d);
+    return array_merge($a, $shift);
+}
+
+$fptr = fopen(getenv("OUTPUT_PATH"), "w");
+
+$stdin = fopen("php://stdin", "r");
+
+fscanf($stdin, "%[^\n]", $nd_temp);
+$nd = explode(' ', $nd_temp);
+
+$n = intval($nd[0]);
+
+$d = intval($nd[1]);
+
+fscanf($stdin, "%[^\n]", $a_temp);
+
+$a = array_map('intval', preg_split('/ /', $a_temp, -1, PREG_SPLIT_NO_EMPTY));
+
+$result = rotLeft($a, $d);
+
+fwrite($fptr, implode(" ", $result) . "\n");
+
+fclose($stdin);
+fclose($fptr);