public String conCatAllButLastLetter(String a, String b)

Given 2 strings, return the concatentation of the the strings WITHOUT their LAST letter.

public String conCatAllButLastLetter(String a, String b) {
  int lenA = a.length();
  int lenB = b.length();
  String aNoLast = a.substring(0,lenA-1);
  String bNoLast = b.substring(0,lenB-1);
  String combo = aNoLast + bNoLast;
  return combo;
}