def cap_last_three string; string[0..-4] << string[-3..-1].upcase; end

puts "Enter your word to be upcased."
word = STDIN.gets.chomp

if word.length < 4 then
puts "upcased: #{word.upcase}"
puts "Thanks for upcasing some stuff = William Woodrm"
else
print word.cap_last_three
end