Fix typo "panagram" -> "pangram" (#1836)

strings/check_pangram.py

@@ -0,0 +1,30 @@
+# Created by sarathkaul on 12/11/19
+
+
+def check_pangram(
+    input_str: str = "The quick brown fox jumps over the lazy dog",
+) -> bool:
+    """
+    A Pangram String contains all the alphabets at least once.
+    >>> check_pangram("The quick brown fox jumps over the lazy dog")
+    True
+    >>> check_pangram("My name is Unknown")
+    False
+    >>> check_pangram("The quick brown fox jumps over the la_y dog")
+    False
+    """
+    frequency = set()
+    input_str = input_str.replace(
+        " ", ""
+    )  # Replacing all the Whitespaces in our sentence
+    for alpha in input_str:
+        if "a" <= alpha.lower() <= "z":
+            frequency.add(alpha.lower())
+
+    return True if len(frequency) == 26 else False
+
+
+if __name__ == "main":
+    check_str = "INPUT STRING"
+    status = check_pangram(check_str)
+    print(f"{check_str} is {'not ' if status else ''}a pangram string")