input_text = "HelloWorld"
output_text = ""

from_map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
to_map   = "NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm"

for character in input_text:

  search_index = 0

  while character != from_map[search_index]:
    search_index = search_index + 1

  output_text = output_text + to_map[search_index]

print(output_text)