import re
import sys


def isPow2Hex(s):
    pattern = re.compile(r'^(?:[1-9A-Fa-f]0*|0)$')
    return bool(re.match(pattern, s))

# inFile = sys.argv[1]
# outFile = sys.argv[2]

inFile = 'test.in'
outFile = 'test.out'

with open(inFile, 'r', encoding='utf-8') as inputFile, open(outFile, 'w', encoding='utf-8') as outputFile:
    for line in inputFile:
        line = line.strip()
        result = "yes" if isPow2Hex(line) else "no"
        outputFile.write(result + '\n')