s=input()
if(s=='a' or s=='e' or s=='i' or s=='o' or s=='u'):
   print("Vowel")
elif(s=='b' or s=='c' or s=='d' or s=='f' or s=='g'or s=='h' or s=='j'or s=='k' or s=='l' or s=='m' or s=='n' or s=='p' or s=='q' or s=='r' or s=='s'or s=='t' or s=='v'or s=='w' or s=='x' or s=='y' or s=='z'):
   print("Consonant")
else:
   print("invalid")
