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  static int countDuplicatesSorted(int[] a, int[] b) {    int h[] = new int[a.length + b.length];    int duplicates = 0;    for (int i = 0; i < a.length; i++) {      h[i] = a[i];    }    for (int i = 0; i < b.length; i++) {      h[i + a.length] = b[i];    }    Arrays.sort(h);    for (int i = 0; i < h.length - 1; i++) {      if (h[i] == h[i+1]) {        duplicates++;      }    }    return duplicates;  }