1065. Index Pairs of a String

Given a text  string and words (a list of strings), return all index pairs [i, j] so that the substring text[i]...text[j]  is in the list of words .

 

Example 1:

Input: 

text = 
"thestoryofleetcodeandme"

, words = 
["story","fleet","leetcode"]

Output: 

[[3,7],[9,13],[10,17]]

Example 2:

Input: 

text = 
"ababa"

, words = 
["aba","ab"]

Output: 

[[0,1],[0,2],[2,3],[2,4]]

Explanation: 

Notice that matches can overlap, see "aba" is found in [0,2] and [2,4].

 

Note:

1. All strings contains only lowercase English letters.
2. It's guaranteed that all strings in words are different.
3. 1 <= text.length <= 100
4. 1 <= words.length <= 20
5. 1 <= words[i].length <= 50
6. Return the pairs [i,j] in sorted order (i.e. sort them by their first coordinate in case of ties sort them by their second coordinate).