function [ ] = DisplayPerm(Perm)
%[ ] = DisplayPerm(Perm)
format compact
fprintf('   Plaintext    Ciphertext           \r')
fprintf('===============================\r')
for k=0:25
   CtextInt = Perm(2, k+1)-1;
   fprintf('      %s            %s          \r', char(97+k), char(65+CtextInt));
end;