#include <bits/stdc++.h>
using namespace std;
char s1[151], s2[100010], s3[151], s4[100010];
int pi[155];
int st1[100010], st2[100010], st3[100010], st4[100010];
void profix(char *s11) {
  memset(pi, 0, sizeof(pi));
  int l = strlen(s11);
  for (int i = 1; i <= l; i++) pi[i] = 1;
  int k = 0;
  pi[1] = 0;
  for (int i = 2; i <= l; i++) {
    while (k > 0 && s11[k] != s11[i - 1]) k = pi[k];
    if (s11[k] == s11[i - 1]) k++;
    pi[i] = k;
  }
}
void KMP(char *s11, char *s22, int *stt1) {
  int l1 = strlen(s11), l2 = strlen(s22);
  for (int i = 0; i <= l2 - l1; i++) {
    bool find = 1;
    for (int j = i; j <= i + l1 - 1; j++) {
      if (s22[j] != s11[j - i]) {
        find = 0;
        break;
      }
    }
    if (find) stt1[++stt1[0]] = i;
  }
}
int main() {
  while (scanf("%s", &s2) == 1) {
    scanf("%s", &s1);
    scanf("%s", &s3);
    int l1 = strlen(s2);
    int l2 = strlen(s1);
    int l3 = strlen(s3);
    for (int i = 0; i < l1; i++) s4[i] = s2[l1 - i - 1];
    s4[l1] = '\0';
    bool flag1 = 0, flag2 = 0;
    st1[0] = 0;
    st2[0] = 0;
    st3[0] = 0;
    st4[0] = 0;
    profix(s1);
    KMP(s1, s2, st1);
    profix(s3);
    KMP(s3, s2, st2);
    profix(s1);
    KMP(s1, s4, st3);
    profix(s3);
    KMP(s3, s4, st4);
    if (st1[0] && st2[0]) {
      if (st2[st2[0]] >= st1[1] + l2) flag1 = 1;
    }
    if (st3[0] && st4[0]) {
      if (st4[st4[0]] >= st3[1] + l2) flag2 = 1;
    }
    if (flag1 && (!flag2))
      printf("forward\n");
    else if ((!flag1) && flag2)
      printf("backward\n");
    else if (flag1 && flag2)
      printf("both\n");
    else
      printf("fantasy\n");
  }
  return (0);
}
