#include<bits/stdc++.h>
using namespace std;
int main(){
	string str;
	int flag=0;
	cin>>str;
	transform(str.begin(), str.end(),str.begin(),::tolower);
	while(str.find("tantan")!=string::npos){
		str.replace(str.find("tantan"),6,"baibai");
		flag =1;
	}
	if(flag){
		cout<<str<<endl;
	}else{
		cout<<"not find"<<endl;
	}
}