#include <stdio.h>
#include <stdlib.h>

int main(int argc, char const *argv[]) {
  int i,j,c,t,f1;
  i=0;
  c=0;
  int f=0;
  char str[100];
  do {
    f1=0;

  scanf("%s",str);
  for (t = 0; str[t]!='\0'; t++) {
    if(str[t]>'z'||str[t]<'a'){
      f1=1;
    }
  }
}while(sizeof(str)/sizeof(char)>100||f1==1);
while (str[c++]!='\0'){}
  while(i<c-5){
  for ( i = 0; i < c-5; i++) {

    if(str[i]=='t'&&str[i+1]=='r'&&str[i+2]=='e'&&str[i+3]=='e'&&str[i+4]=='o'&&str[i+5]=='n'&&str[i+6]=='e'){
    f=1;
    break;
  }
  }
  if(f==1){
    str[i]='f';
    str[i+1]='o';
    str[i+2]='r';
    str[i+3]='e';
    str[i+4]='s';
    str[i+5]='t';
  }
  for ( j = i+6; j < c-1; j++) {
 str[j]=str[j+1];

}
i++;
f=0;
}
str[c-1]='\n';
str[c]='\0';
 printf("%s",str);
return 0;
}