//sstream头文件中的stringstream函数可以用来遍历和分割数组

include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

using namespace std;
int main(){
string str;
string str1;
string str2;
string output;
getline(cin,str);
getline(cin,str1);
getline(cin,str2);

stringstream input(str);//stringstream分割数组，空格为一次
string word;

while(input>>word){
    if(word==str1){
        output+=str2+" ";
    }else{
        output+=word+" ";
    }
}   
    cout<<output<<'\n';

return 0;

}