diff --git a/TaskF00/run.py b/TaskF00/run.py
new file mode 100644
index 0000000..853b135
--- /dev/null
+++ b/TaskF00/run.py
@@ -0,0 +1,31 @@
+import re
+def replace_digits_with_letters(input_string):
+    digit_to_letter = {'0': 'a', '1': 'b', '2': 'c', '3': 'd', '4': 'e', '5': 'f', '6': 'g', '7': 'h', '8': 'i', '9': 'j'}
+
+    def replace(match):
+        number = match.group()
+        replaced_number = ''.join(digit_to_letter[digit] for digit in number)
+        return replaced_number
+
+    pattern = re.compile(r'\b\d{4}\b|\d{4}')
+    result = pattern.sub(replace, input_string)
+
+    return result
+
+
+def write_answer(row, ouput_file):
+    with open(ouput_file, "a", encoding="utf-8") as file:
+        file.write(row)
+
+
+def main_function(input_file, output_file):
+    with open(output_file, "w", encoding="utf-8") as output_file1:
+        with open(input_file, "r", encoding="utf-8") as file:
+            for row in file:
+                write_answer(replace_digits_with_letters(row), output_file)
+
+output_file ='simple.out'
+input_file = 'simple.in'
+main_function(input_file, output_file)
+# input_file = sys.argv[1]
+# output_file = sys.argv[2]
diff --git a/TaskF00/simple.out b/TaskF00/simple.out
new file mode 100644
index 0000000..bf27951
--- /dev/null
+++ b/TaskF00/simple.out
@@ -0,0 +1,3 @@
+dece 34  dfd gfdfedc
+f33sdfsdbcdebcdedsfsdf
+3r