diff --git a/IceBase/funny-adding.py b/IceBase/funny-adding.py
new file mode 100644
index 0000000..9fd2283
--- /dev/null
+++ b/IceBase/funny-adding.py
@@ -0,0 +1,9 @@
+def checkio(data):
+    a, b = data
+    return a + b
+
+
+if __name__ == '__main__':
+    assert checkio([5, 5]) == 10, 'First'
+    assert checkio([7, 1]) == 8, 'Second'
+    print('All ok')
\ No newline at end of file
diff --git a/IceBase/microwave-ovens.py b/IceBase/microwave-ovens.py
new file mode 100644
index 0000000..2740696
--- /dev/null
+++ b/IceBase/microwave-ovens.py
@@ -0,0 +1,101 @@
+class MicrowaveBase:
+    def __init__(self):
+        self.time = "00:00"
+
+    def set_time(self, time: str):
+        self.time = time
+
+    def add_time(self, time: str):
+        minute, second = self.time.split(":")
+        minute = int(minute)
+        second = int(second)
+        number_to_add = int(time[0:-1])
+        unit_to_add = time[-1:]
+        if unit_to_add == "s":
+            second += number_to_add
+            while second >= 60:
+                minute += 1
+                second = second - 60
+        else:
+            minute += number_to_add
+        if minute > 90:
+            self.time = "90:00"
+        else:
+            self.time = "{}:{}".format(str(minute).rjust(2, "0"), str(second).rjust(2, "0"))
+
+    def del_time(self, time: str):
+        minute, second = self.time.split(":")
+        minute = int(minute)
+        second = int(second)
+        number_to_add = int(time[0:-1])
+        unit_to_add = time[-1:]
+        if unit_to_add == "s":
+            second -= number_to_add
+            while second <= 0:
+                minute -= 1
+                second *= -1
+        else:
+            minute -= number_to_add
+        if minute < 0:
+            self.time = "00:00"
+        else:
+            self.time = "{}:{}".format(str(minute).rjust(2, "0"), str(second).rjust(2, "0"))
+
+
+
+class Microwave1(MicrowaveBase):
+    def show_time(self) -> str:
+        print("_"+self.time[1:])
+        return "_"+self.time[1:]
+
+
+class Microwave2(MicrowaveBase):
+    def show_time(self):
+        print(self.time[0:-1] + "_")
+        return self.time[0:-1] + "_"
+
+
+class Microwave3(MicrowaveBase):
+    def show_time(self):
+        print(self.time)
+        return self.time
+
+
+class RemoteControl:
+    def __init__(self, microwave: MicrowaveBase):
+        self.microwave = microwave
+
+    def set_time(self, time: str):
+        self.microwave.set_time(time)
+
+    def add_time(self, time: str):
+        self.microwave.add_time(time)
+
+    def del_time(self, time: str):
+        self.microwave.del_time(time)
+
+    def show_time(self):
+        return self.microwave.show_time()
+
+
+if __name__ == '__main__':
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+
+    microwave_1 = Microwave1()
+    microwave_2 = Microwave2()
+    microwave_3 = Microwave3()
+
+    remote_control_1 = RemoteControl(microwave_1)
+    remote_control_1.set_time("01:00")
+
+    remote_control_2 = RemoteControl(microwave_2)
+    remote_control_2.add_time("90s")
+
+    remote_control_3 = RemoteControl(microwave_3)
+    remote_control_3.del_time("300s")
+    remote_control_3.add_time("100s")
+
+    assert remote_control_1.show_time() == "_1:00"
+    assert remote_control_2.show_time() == "01:3_"
+    assert remote_control_3.show_time() == "01:40"
+    print("Coding complete? Let's try tests!")
diff --git a/IceBase/pangram.py b/IceBase/pangram.py
new file mode 100644
index 0000000..4786d91
--- /dev/null
+++ b/IceBase/pangram.py
@@ -0,0 +1,21 @@
+def check_pangram(text):
+    """
+        is the given text is a pangram.
+    """
+    alphabet = list(map(chr, range(97, 123)))
+    for letter in text.lower():
+        if len(alphabet) == 0:
+            return True
+        if letter in alphabet:
+            alphabet.remove(letter)
+    if len(alphabet) == 0:
+        return True
+    return False
+
+
+if __name__ == '__main__':
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+    assert check_pangram("The quick brown fox jumps over the lazy dog."), "brown fox"
+    assert not check_pangram("ABCDEF"), "ABC"
+    assert check_pangram("Bored? Craving a pub quiz fix? Why, just come to the Royal Oak!"), "Bored?"
+    print('If it is done - it is Done. Go Check is NOW!')
diff --git a/IceBase/party-invitations.py b/IceBase/party-invitations.py
new file mode 100644
index 0000000..a048ca0
--- /dev/null
+++ b/IceBase/party-invitations.py
@@ -0,0 +1,52 @@
+class Friend:
+    def __init__(self, name):
+        self.name = name
+        self.invite = None
+
+    def set_invite(self, date):
+        self.invite = date
+
+    def show_invite(self):
+        if self.invite is not None:
+            return self.invite
+        return "No party..."
+
+
+class Party:
+    def __init__(self, name):
+        self.name = name
+        self.friends = []
+
+    def add_friend(self, friend: Friend):
+        self.friends.append(friend)
+
+    def send_invites(self, date: str):
+        for friend in self.friends:
+            friend.set_invite("{}: {}".format(self.name, date))
+
+    def del_friend(self, friend: Friend):
+        self.friends.remove(friend)
+
+
+if __name__ == '__main__':
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+
+    party = Party("Midnight Pub")
+    nick = Friend("Nick")
+    john = Friend("John")
+    lucy = Friend("Lucy")
+    chuck = Friend("Chuck")
+
+    party.add_friend(nick)
+    party.add_friend(john)
+    party.add_friend(lucy)
+    party.send_invites("Friday, 9:00 PM")
+    party.del_friend(nick)
+    party.send_invites("Saturday, 10:00 AM")
+    party.add_friend(chuck)
+
+    assert john.show_invite() == "Midnight Pub: Saturday, 10:00 AM"
+    assert lucy.show_invite() == "Midnight Pub: Saturday, 10:00 AM"
+    assert nick.show_invite() == "Midnight Pub: Friday, 9:00 PM"
+    assert chuck.show_invite() == "No party..."
+    print("Coding complete? Let's try tests!")