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