8A - Train and Peter - CodeForces Solution

t1=input()
s1=input()
s2=input()
t2=t1[::-1]
ans,san=0,0
if s1 in t1:
	if s2 in t1[t1.index(s1)+len(s1):]:ans+=1
if s1 in t2:
	if s2 in t2[t2.index(s1)+len(s1):]:san+=1
if ans==1 and san==1:print('both')
elif ans==1:print('forward')
elif san==1:print('backward')
else:print('fantasy')