#!/usr/bin/env python

import polyglot
from polyglot.detect import Detector
import fileinput

for line in fileinput.input():
    try:
        for lang in Detector(line).languages:
            if lang.confidence > 80.0:
                print(lang.confidence)
            else:
                print("??")
            break
    except polyglot.detect.base.UnknownLanguage:
        print("??")
        pass