import hashlib,random

l="BCDFGHJKMPQRTVWXY2346789"

o=random.sample(l,13)

k=''.join(''.join([l[int(c,16)],o.pop(0)])for c in hashlib.sha256(''.join(o[:12])).hexdigest()[-13:])

print'-'.join(k[i:i+5]for i in range(0,25,5))