#include<stdio.h>
#include<string.h>
int main()
{
    char n;
    scanf("%c",& n);
    if(n=='a' || n=='e' || n=='i' || n=='o' || n=='u')
       printf("Since %c is a vowel,print vowel.",n);
    else
       printf("Constant");
   return 0;
}
