#include <cstdio>

char ch[240];

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

  fread(ch, 1, 200, stdin);

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


  return 0;
}