public String concatWithoutFirstLastLetters(String a, String b)

Given 2 strings, return the concatentation of the the strings WITHOUT their FIRST and LAST letters.

public String concatWithoutFirstLastLetters(String a, String b) {
  int lenA = a.length();
  int lenB = b.length();
  String aNo1stLast = a.substring(1,lenA-1);
  String bNo1stLast = b.substring(1,lenB-1);
  String combo = aNo1stLast + bNo1stLast;
  return combo;
}