Added task 3

basic programming/3rd task/4.py

@@ -0,0 +1,18 @@
+def split(txt: str) -> tuple:
+    space_index = 0
+    while txt[space_index] != ' ':
+        space_index += 1
+    part1 = txt[:space_index]
+    part2 = txt[space_index+1:]
+    return part1, part2
+
+def main_4ex():
+    txt1 = "Hello World"
+    part1, part2 = split(txt1)
+    print(f'For input {txt1} we get {part1} and {part2}')
+
+    txt2 = "Leo Messi"
+    part1, part2 = split(txt2)
+    print(f'For input {txt2} we get {part1} and {part2}')
+
+main_4ex()