import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class Main {
    public static void main (String[] args) throws IOException {
        File file = new File(args[0]);
        BufferedReader buffer = new BufferedReader(new FileReader(file));
        String line;
        while ((line = buffer.readLine()) != null) {
            line = line.trim();
            String rep1 = Character.toString(line.charAt(0));
            for(int i = 1; i < line.length(); i++){
                if((Character.toString(rep1.charAt(0))).equalsIgnoreCase(Character.toString(line.charAt(i))))
                    break;
                else
                    rep1 += Character.toString(line.charAt(i));
            }
            System.out.println(rep1.length());
        }
    }
}