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class Solution {
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  public String sortSentence(String s) {
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    String[] res = new String[s.split(" ").length];
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    for (String st : s.split(" ")) {
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      res[st.charAt(st.length() - 1) - '1'] = st.substring(0, st.length() - 1);
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    }
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    return String.join(" ", res);
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  }
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}