diff --git a/regExpr_ex1.py b/regExpr_ex1.py
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+++ b/regExpr_ex1.py
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+'''EPR 07 Aufgabe 1'''
+__author__ = "7987847, Werner, 7347119, Fajst, 7735965, Melikidze"
+
+import re
+
+
+# a) All character strings between < and the next >. 
+# The two < and > can also be output. Example: <a>, <span …>.
+# b) All (annual) numbers between 1900 and 2099.
+
+
+def extract_annual(text):
+    '''
+    Extract all annual numbers between 1900 and 2099.
+    Return a list of strings.
+    valid years are 1900-2099
+    '''
+    # Extract all annual numbers between 1900 and 2099.
+    # Return a list of strings.
+    # valid years are 1900-2099
+    return re.findall(r'19[0-9][0-9]|20[0-9][0-9]', text)
+    # return re.findall(r'\b(19|20)\d\d\b', text)
+
+
+def extract_tags(text):
+    '''
+    Extract all tags.
+    Return a list of strings.
+    '''
+    # Extract all tags.
+    # Return a list of strings.
+    return re.findall(r'<[^>]+>', text)
+
+
+def extract_strings(text):
+    '''
+    Extract all strings outside that are between > and <.
+    Return a list of strings.
+    '''
+    # Extract all strings outside that are between > and <.
+    # Return a list of strings.
+    return re.findall(r'>([^<]+)<', text)
+
+
+def main():
+    '''
+    Main function.
+    '''
+    # open file
+    with open('PythonEntwicklungG.txt', 'r') as file:
+        # read a list of lines into data
+        data = file.readlines()
+        file.close()
+
+        data_extracted = []
+        for line in data:
+            tag_list = extract_tags(line)
+            if tag_list:
+                data_extracted.append(tag_list)
+            strings_list = extract_strings(line)
+            if strings_list:
+                data_extracted.append(strings_list)
+            annual_list = extract_annual(line)
+            if annual_list:
+                data_extracted.append(annual_list)
+
+        for _ in data_extracted:
+            if type(_) == list:
+                for __ in _:
+                    # check the type of the element
+                    try:
+                        if type(int(__)) == int:
+                            # print with formatted tab spacing and color in Red
+                            print(
+                                f'{__:<110} <--- is an annual number',
+                                end='\t\n')
+
+                        elif type(__) == str:
+                            # check if the string is a tag
+                            if __.startswith('<') and __.endswith('>'):
+                                print(
+                                    f'{__:<110} <--- is a Tag string',
+                                    end='\t\n')
+                            else:
+                                print(f'{__:<110} <--- is a string',
+                                      end='\t\n')
+
+                    except ValueError:
+                        if __.startswith('<') and __.endswith('>'):
+                            print(f'{__:<110} <--- is a Tag string',
+                            end='\t\n')
+                        else:
+                            print(f'{__:<110} <--- is a string', end='\t\n')
+
+            else:
+                print(_)
+
+
+if __name__ == '__main__':
+    main()