#include "pch.h"
#include <iostream>
#include <sstream>
#include <string>

using namespace std;

struct el {
string a;
el *p = NULL;
}

int main() {
string line;
getline(cin, line);

stringstream input(line);

el *first = new el;
el *cur =  first;

el *k = NULL;
el *t = NULL;

while (input >> cur->a) {
cur->p = new el;
if (cur->a[0] == 'k' && !k) k = cur;
if (cur->a[0] == 't' && !t) t = cur;
cur = cur->p;
}

if (k && t) swap(*k, *t);

for (; first->next; first = first->p) {
cout << first->a;
}
}