input_text = 'This is a test number +223/34 and this a real number 2333.'
print( " ".join([word for word in input_text.split() if word.isalnum()]) )
CmlucHV0X3RleHQgPSAnVGhpcyBpcyBhIHRlc3QgbnVtYmVyICsyMjMvMzQgYW5kIHRoaXMgYSByZWFsIG51bWJlciAyMzMzLicKcHJpbnQoICIgIi5qb2luKFt3b3JkIGZvciB3b3JkIGluIGlucHV0X3RleHQuc3BsaXQoKSBpZiB3b3JkLmlzYWxudW0oKV0pICk=