code: package zemberek.core;
  
  public class StringPair {
  
    public final String first;
    public final String second;
  
    public StringPair(String first, String second) {
      this.first = first;
      this.second = second;
    }
  
    public static StringPair fromStringLastDelimiter(String str, char delimiter) {
      int index = str.lastIndexOf(delimiter);
      return fromString(str, index);
    }
  
    public static StringPair fromString(String str, char delimiter) {
      int index = str.indexOf(delimiter);
      return fromString(str, index);
    }
  
    private static StringPair fromString(String str, int delimiterPos) {
      if (delimiterPos == -1) {
        throw new IllegalArgumentException("Cannot extract two string from : [" + str + "]");
      }
      String first = str.substring(0, delimiterPos).trim();
      String second = str.substring(delimiterPos).trim();
      return new StringPair(first, second);
    }
  
    public static StringPair fromString(String str) {
      return fromString(str, ' ');
    }
  
  }
  