#include <cstdio>

/*
while(muie)
  ++pula;
*/

char ch[240];

int main() {
  //freopen("date.in", "r", stdin);
  //freopen("date.out", "w", stdout);

  fread(ch, 1, 200, stdin);
  int lim;
  for (lim = 200; lim >= 0; --lim)
    if (ch[lim] != ' ' && ch[lim] != '\n' && ch[lim] != 0)
      break;
  for (int i = 0; 
i <= lim; ++i) {
    if (ch[i] != '-' && ch[i] != '.') {
      if (ch[i] == ',')
        printf(" ");
      printf("%c", ch[i]);
    } else {
      if (ch[i + 1] == ' ') {
        ++i;
      }
    }
  }


  return 0;
}