print((function (b, c, f)
	local a,d,s,r = b("a"),b("a")-b("A"),io.stdin:read("*l"),""
	for i=1,#s do
		r=r..(b(f(s,i,i))>=a and c(b(f(s,i,i))-d) or c(b(f(s,i,i))+d))
	end
	return r
end)(string.byte, string.char, string.sub))