
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

    String readStr;
    while ((readStr = reader.readLine()) != null) {
      String[] formattedStrs = readStr.split(" ");
      int left = Integer.parseInt(formattedStrs[0]);
      int right = Integer.parseInt(formattedStrs[1]);

      int weight = 1;
      int count = 1;
      while (true) {
        int surplus = (left + right) / weight;
        if (surplus < 10) {
          System.out.println(count);
          break;
        }
        weight *= 10;
        count++;
      }

    }
  }

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz