palindrome missing alphabet
s=input()
a=len(s)
if (s[0]!=s[a-1]):
print(s[0])
else:
for i, j in zip(range(0,int(a/2)+1,1), range(a-1,int(a/2)-1,-1)):
if (s[i]!=s[j]) :
if (s[i+1]==s[j]):
print(s[i])
break
else:
print(s[j])
breakCopyright © 2021 Codeinu
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