use proconio::input;
fn main(){
    input!{
        s:String,
    }
    let c:Vec<char>=s.chars().collect();
    let mut q=0;
    let m=c.len();
    let k:Vec<char>="treeone".chars().collect();
    while q<m{
        if q+7>m{
            print!("{}",c[q]);q+=1
        } else {
            let mut s=1;
            for j in (0..7){
                if c[q+j]!=k[j]{
                    s=0;break;
                }
            }
            if s==1{
                print!("{}","forest");q+=7
            } else {
                print!("{}",c[q]);q+=1;
            }
        }
    }
}