int main(){
	int n,i,j;
	int bn[1000];
	char an[1000][21];
	scanf("%d",&n);
	for(i=0;i<n;i++)
		scanf("%s",an[i]);
	for(i=0;i<n;i++)
		bn[i]=strlen(an[i]);
	for(i=0;i<n;i++){
		if(an[i][0]<65||(an[i][0]>90&&an[i][0]<95)||an[i][0]==96||an[i][0]>122){
			printf("no\n");
			continue;
		}
		else{
			for(j=1;j<bn[i];j++){
				if(an[i][j]<48||(an[i][j]>=58&&an[i][j]<=64)||(an[i][j]>=91&&an[i][j]<=94)||an[i][j]==96||an[i][j]>=123){
					printf("no\n");
					break;
				}
				if(j==bn[i]-1)
					printf("yes\n");
			}
		}
	}
		return 0;
	}