content: import java.io.*;
  import java.math.*;
  import java.security.*;
  import java.text.*;
  import java.util.*;
  import java.util.concurrent.*;
  import java.util.regex.*;
  
  public class Solution {
  
  	// Complete the stringConstruction function below.
  	static int stringConstruction(String s) {
  		int[] cache = new int[26];
  		for (int i = 0; i < s.length(); i++) {
  			cache[((int) s.charAt(i)) - 97]++;
  		}
  
  		int counter = 0;
  		for (int i = 0; i < 26; i++) {
  			if (cache[i] != 0) {
  				counter++;
  			}
  		}
  
  		return counter;
  	}
  
  	private static final Scanner scanner = new Scanner(System.in);
  
  	public static void main(String[] args) throws IOException {
  		BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
  
  		int q = scanner.nextInt();
  		scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
  		for (int qItr = 0; qItr < q; qItr++) {
  			String s = scanner.nextLine();
  
  			int result = stringConstruction(s);
  
  			bufferedWriter.write(String.valueOf(result));
  			bufferedWriter.newLine();
  		}
  
  		bufferedWriter.close();
  
  		scanner.close();
  	}
  }
  