print only the first character of each word from a String

void setup () {
  String sentense = "I Am Engineering";
  TheFirstChar(sentense);
}
void TheFirstChar (String a) {
  char space = ' ';
  if (a.charAt(0)!=space) {
    println(a.charAt(0));
  }
  for (int i =0; i<a.length ()-1; i++) {
    if (a.charAt(i)==space) {
      println (a.charAt(i+1));
    }
  }
}