int main()
{
int n;
scanf("%d",&n);
char zfc[100][20];
int i,j;
int e;
for(i=0;i<n;i++){
scanf("%s",zfc[i]);
} 
int k;

for(i=0;i<n;i++)
{
	k=0;
	
	for(j=0;zfc[i][j]!='\0';j++)
	{
		if((zfc[i][j]>='0'&&zfc[i][j]<='9')||(zfc[i][j]==95)||(zfc[i][j]>='A'&&zfc[i][j]<='Z')||(zfc[i][j]>='a'&&zfc[i][j]<='z'))
		{
			if(j==0)
			{
				if(zfc[i][0]>='0'&&zfc[i][0]<='9')
				{
				k+=1;
				}
				else
				{
				k+=0;
				}
			}
		k+=0;
		}
		else
		{
		k+=1;
		};
	}
	
	if(k==0)
	{
		if(i==(n-1))
		{
			printf("yes");
		}
		else{printf("yes\n");}
	}
	else
	{
		if(i==(n-1))
		{printf("no");}
		else{
			printf("no\n");}
	}

}

return 0;
}

