ambigram.py

R=dict(a='eD',b='q',d='pP',h='y',l='l',m='w',n='uU',o='oOGQ',s='sS',t='t',x='xX',z='zZ',A='vV',B='E',D='G',H='H',I='I',M='W',N='N')
V='ijlmnotuvwxyAHIMOQTUVWXY'
W=dict(b='d',p='q',s='z',B='E',G='D',S='Z')
H='lotxBCDEHIKOX'
T='AHIMOTUVWXYilmnotuvwxy'
s=raw_input()
r=v=h=t=1
for i,j in R.items():
 for c in j:R[c]=R.get(c,'')+i
for i,j in W.items():
 for c in j:W[c]=W.get(c,'')+i
for i in range(len(s)):
 c,l=s[i],s[-i-1]
 r&=(c in R)+(l in R[c])>1
 v&=(c in V)+(l in V)>1
 h&=(c in H)+(l in H)>1
 t&=c in T
print'R'*r+'V'*v+'H'*h+'T'*t