#include "stdio.h"
#include "string.h"
int main()
{
	unsigned int i;
	int flag=0,a=0,b=0,flag1=0,length;
	char q[20],t[4]="end",p[5]={'a','e','i','o','u'};
	while(gets(q))
	{
		if(strcmp(q,t)==0)
			break;
		length=strlen(q);
		if(length==1)
		{
			if(q[0]=='a'||q[0]=='e'||q[0]=='i'||q[0]=='o'||q[0]=='u')
				printf("<%s> is acceptable.\n",q);
			else
				printf("<%s> is not acceptable.\n",q);
			flag1=1;
		}
		else
		{		
			for(i=0;i<=length-1;i++)
			{
				if(q[i]=='a'||q[i]=='e'||q[i]=='i'||q[i]=='o'||q[i]=='u')
				{
					flag=1;//1
					a++;
					b=0;
					if(a==3)
					{	printf("<%s> is not acceptable.\n",q);flag1=1;break;}
				}
				else
				{
					b++;
					a=0;
					if(b==3)
					{  printf("<%s> is not acceptable.\n",q);flag1=1;break;}
				}
				if(i!=length-1)
				{
					if(q[i]==q[i+1]&&q[i]!='e'&&q[i]!='o')//3				
					{  printf("<%s> is not acceptable.\n",q);flag1=1;break;}
				}
			}
		}
		if(flag1==0)
			if(flag==1)
				printf("<%s> is acceptable.\n",q);
			else
				printf("<%s> is not acceptable.\n",q);
		a=0;
		b=0;
		flag=0;
		flag1=0;
	}
	return 0;
}