fprintf("a)");
string1 = "NLOGJGYYNMJONCH";
p1 = double(string);
disp(p1);
n = 15;
for i=1:26;
  p1=p1+1;
  for j=1:n;
    a(j) = char([mod(p1(j), 26)]+65);
  end
  disp(a);
end

disp("");

fprintf("b)");
string2 = "ENFVYNTBRFPUVAN";
p2 = double(string2);
disp(p2);
n = 15;
for i=1:26;
  p2=p2+1;
  for j=1:n;
    a(j) = char([mod(p2(j), 26)]+65);
  end
  disp(a);
end