#include <iostream>
#include <string>
#include <regex>
 
using namespace std;
 
int main()
{
  string s;
  cin >> s;
 
  cout << regex_replace
  (
    regex_replace
    (
      regex_replace
      (
        s,
        regex("\\d+\\b"),
        "$&#$&-$&"
      ) + "0123456789",
      regex("(\\b(?=9.*(1))|0(?=.*(1))|1(?=.*(2))|2(?=.*(3))|3(?=.*(4))|4(?=.*(5))|5(?=.*(6))|6(?=.*(7))|7(?=.*(8))|8(?=.*(9))|9(?=.*(0)))(?=9*-)|\\d{10}$"),
      "$2$3$4$5$6$7$8$9$10$11$12"
    ),
    regex("(#(\\d+)-\\d+,\\2\\b)+#\\d+|#\\d+-\\d+"),
    ""
  ) << '\n';
 
  return 0;
}

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

MSwzLDQsNSw2LDcsOCwxMCwxMiwxNiwxNywyMCwyMSwyMiwyMywyNCwyOCwyOSwzMCwzMSw5Niw5Nyw5OCw5OSwxMDAsMTAxLDEwMg==

1,3,4,5,6,7,8,10,12,16,17,20,21,22,23,24,28,29,30,31,96,97,98,99,100,101,102