>>> from eurovision import they_hate_us

>>> they_hate_us("FRA:10 points. GBR:03 points. POR:00 points. ")
'POR'
>>> they_hate_us("FRA:03 points. GBR:03 points. POR:03 points. ")
''
>>> they_hate_us("FRA:00 points. GBR:03 points. POR:00 points. ")
'FRA'
>>> they_hate_us('')
''
>>> they_hate_us("FRA:10 points. GBR:00 points. POR:00 points. ")
'GBR'
>>> they_hate_us("FRA:10 points. GBR:03 points. POR:03 points. ")
''
>>> they_hate_us("FRA:10 points. GBR:10 points. POR:10 points. ")
''
>>> they_hate_us('')
''