#include <iostream.h>
#include <string.h>
void main() {
  char s[250], c1, c2;
  cin.get(s, 250);
  cin >> c1 >> c2;
  cout << s << endl;
  for (int i = 0; i < strlen(s); i++)
    if (s[i] == c1)
      s[i] = c2;
    else if (s[i] == c2)
      s[i] = c1;
  cout << s;
}