#include <bits/stdc++.h>   using namespace std;   inline void FAST_IO() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);   }   template <class F, class S>   ostream& operator<<(ostream& os, pair<F, S>& p) {     os <<  (  << p.first <<  ,  << p.second <<  ) ;     return os;   }   template <class T, class S>   ostream& operator<<(ostream& os, map<T, S>& v) {     os <<  { ;     for (auto& i : v) cout <<  {  << i.first <<  ,  << i.second <<  } ;     os <<  } ;     return os;   }   template <class T>   ostream& operator<<(ostream& os, set<T>& v) {     os <<  { ;     for (auto& i : v) cout << i <<  , ;     os <<  } ;     return os;   }   template <class T>   ostream& operator<<(ostream& os, vector<T>& v) {     os <<  [ ;     if (v.size()) os << v[0];     for (int i = 1; i < v.size(); ++i) os <<  ,  << v[i];     os <<  ] ;     return os;   }   int main() {     int n;     vector<bool> in(1002);     while (cin >> n) {       in[n] = true;       getchar();     }     int first = true;     for (int i = 0; i < in.size(); ++i) {       if (!in[i]) continue;       int begin = i;       while (in[i]) i++;       if (!first) printf( , );       if (i - begin > 1)         printf( %d-%d , begin, i - 1);       else         printf( %d , i - 1);       first = false;     }     cout << endl;     return 0;   }   