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