public void callback(String word, int level) {
if (word == null) return;
int maxidx = word.length();
int lastStart = -1;
int i = 0;
while (i < maxidx) {
char c = word.charAt(i);
if (Character.isLetter(c) == true) {
if (lastStart == -1) {
lastStart = i;
}
} else {
if (lastStart != -1 && i > lastStart) {
backend.callback(word.substring(lastStart, i), level);
lastStart = -1;
}
}
++i;
}
}
