# 320 Generalized Abbreviation

### Problem:

Write a function to generate the generalized abbreviations of a word.

Example: Given word = "word", return the following list (order does not matter): ["word", "1ord", "w1rd", "wo1d", "wor1", "2rd", "w2d", "wo2", "1o1d", "1or1", "w1r1", "1o2", "2r1", "3d", "w3", "4"]

### Solutions:

``````public class Solution {
public List<String> generateAbbreviations(String word) {
for (int i = 1; i <= word.length(); i ++) {
for (int j = 0; j + i <= word.length(); j ++) {
List<String> following = generateAbbreviations(j + i + 1 <= word.length()?word.substring(j + i + 1):"");
for (String f:following) {
String s = word.substring(0, j) + i + (j + i < word.length()?word.charAt(j + i):"") + f;
}
}
}
return result;
}
}
``````
``````public class Solution {
public List<String> generateAbbreviations(String word) {
dfs(result, "", 0, word);
return result;
}
private void dfs(List<String> result, String prefix, int start, String w) {
if (start == w.length()) {
return;
}
int i = start;
if (start > 0) {
i = start + 1;
}
for (; i < w.length(); i++) {
String next = prefix + w.substring(start, i);
for (int j = 1; j <= w.length() - i; j++) {
dfs(result,  next + j, i + j, w);
}
}

}
}
``````