in reply to Golf: ROT-n
# 345678 1 2345678 2 2345678 3 2345678 4 2345678 y/a-z/b-za/for($\=pop)x+pop;print [download]
# 345678 1 2345678 2 2345678 3 2345678 4 2345678 y//-za/cfor($_=pop)x+pop;print (that's \001 as start of the range) [download]