diff --git a/DsaPlayGround/PlayGround/FizzBuzz.py b/DsaPlayGround/PlayGround/FizzBuzz.py
new file mode 100644
index 0000000..f0dfb73
--- /dev/null
+++ b/DsaPlayGround/PlayGround/FizzBuzz.py
@@ -0,0 +1,21 @@
+def fizzbuzz():
+    count = 3
+    while True:
+        user_input = int(input('Enter a positive integer: '))
+        if count == 0:
+            break
+        if user_input <= 0:
+            count -= 1
+            print(f'you have {count} trials left, you can only enter a positivenumber,try again!\n')
+        else:
+            if user_input % 3 == 0 and user_input % 5 == 0:
+                print('FizzBuzz')
+            elif user_input % 5 == 0:
+                print('Buzz')
+            elif user_input % 3 == 0:
+                print('Fizz')
+            else:
+                print(str(user_input))
+
+
+fizzbuzz()
diff --git a/DsaPlayGround/PlayGround/task4.py b/DsaPlayGround/PlayGround/task4.py
new file mode 100644
index 0000000..7b23c5a
--- /dev/null
+++ b/DsaPlayGround/PlayGround/task4.py
@@ -0,0 +1,20 @@
+# Question
+# Array and String Manipulation
+
+# Program to print Odd and Even Numbers from an integer Array.
+# Input:
+#[1, 2, 5, 6, 3, 2]
+
+
+input = [1, 2, 5, 6, 3, 2]
+
+
+def even():
+    for x in input:
+        if x % 2 == 0:
+            print(x, 'is an even number')
+        else:
+            print(x, 'is an odd number')
+
+
+even()
diff --git a/DsaPlayGround/PlayGround/username.py b/DsaPlayGround/PlayGround/username.py
new file mode 100644
index 0000000..3c12f28
--- /dev/null
+++ b/DsaPlayGround/PlayGround/username.py
@@ -0,0 +1,30 @@
+import string
+
+
+valid_character = set(string.ascii_letters + string.digits + '_' + '-')
+
+
+message = ('@User_One @UserABC! Have you seen this from @Userxyz?').split()
+
+
+def user_name(message, k):
+    key = 1
+
+    user_dict = {key: ' '}
+    for word in message:
+        if word.startswith('@'):
+            username = word[1:]
+            for i in range(len(username)):
+                if not (set(username[i]).issubset(valid_character)):
+                    username = username[0:i]
+            user_dict[key] = username
+            key += 1
+    try:
+        return user_dict[k]
+    except:
+        print(' ')
+
+
+print(user_name(message, 3))
+print(user_name(message, 2))
+print(user_name(message, 1))