#include <stdio.h>
#include <string.h>
int main()
{
	char m;
	int i,n;
   //while(scanf("%c",&m)!=EOF)
   for(i=0;i<n;i++)
   {
   	scanf("%c",&m);
   
    
       if(m=='a'||m=='e'||m=='i'||m=='o'||m=='u')
		 	{
		   		printf("vowel\n");break;
		    }
			else
		 	{
		  		printf("consonant\n");break;
		  	}
}
	
return 0;
}