import re
text = 'my example example example string contains example example some text'
text = re.sub(r'\b(\w+)(?:\s+\1)+\b', r'\1', text)
print(text)# your code goes here
aW1wb3J0IHJlCgp0ZXh0ID0gJ215IGV4YW1wbGUgZXhhbXBsZSBleGFtcGxlIHN0cmluZyBjb250YWlucyBleGFtcGxlIGV4YW1wbGUgc29tZSB0ZXh0JwoKdGV4dCA9IHJlLnN1YihyJ1xiKFx3KykoPzpccytcMSkrXGInLCByJ1wxJywgdGV4dCkKCnByaW50KHRleHQpIyB5b3VyIGNvZGUgZ29lcyBoZXJl