import re
stringToMatch = "sydney bogota berlin tokyo nairobi denver rio";
match = re.search(r'(\b(?!bcogo|nai)\w*\b)\w+', stringToMatch)
print(match)
m = re.search(r'\w*\b\w+', stringToMatch)
print(match)
aW1wb3J0IHJlCgpzdHJpbmdUb01hdGNoID0gInN5ZG5leSBib2dvdGEgYmVybGluIHRva3lvIG5haXJvYmkgZGVudmVyIHJpbyI7CgptYXRjaCA9IHJlLnNlYXJjaChyJyhcYig/IWJjb2dvfG5haSlcdypcYilcdysnLCBzdHJpbmdUb01hdGNoKQpwcmludChtYXRjaCkKCm0gPSByZS5zZWFyY2gocidcdypcYlx3KycsIHN0cmluZ1RvTWF0Y2gpCnByaW50KG1hdGNoKQ==