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#include <bits/stdc++.h>
using namespace std;
int main() {
  char a[100002], b[100002], c[100002];
  int alen[28] = {0}, blen[28] = {0}, clen[28] = {0};
  scanf("%s", a);
  scanf("%s", b);
  scanf("%s", c);
  int len1 = strlen(a);
  int len2 = strlen(b);
  int len3 = strlen(c);
  int flag = 0, i, j;
  for (i = 0; i < len1; i++) {
    alen[a[i] - 'a']++;
  }
  for (i = 0; i < len2; i++) {
    blen[b[i] - 'a']++;
  }
  for (i = 0; i < len3; i++) {
    clen[c[i] - 'a']++;
  }
  for (i = 0; i < 27; i++) {
    if (blen[i] > alen[i]) {
      flag = 1;
      break;
    }
  }
  if (flag == 1) {
    flag = 0;
    for (i = 0; i < 27; i++) {
      if (clen[i] > alen[i]) {
        flag = 1;
        break;
      }
    }
    if (flag == 1)
      printf("%s", a);
    else {
      printf("%s", c);
      for (i = 0; i < 27; i++) alen[i] = alen[i] - clen[i];
      for (i = 0; i < 27; i++) {
        for (j = 0; j < alen[i]; j++) {
          printf("%c", i + 97);
        }
      }
    }
  } else {
    printf("%s", b);
    for (i = 0; i < 27; i++) alen[i] = alen[i] - blen[i];
    for (i = 0; i < 27; i++) {
      for (j = 0; j < alen[i]; j++) {
        printf("%c", i + 97);
      }
    }
  }
  printf("\n");
  return 0;
}
